Which of the following represent physical properties or changes, and which represent chemical properties or changes? You curl your hair with a curling iron. You curl your hair by getting a “permanent wave” at the hair salon. Ice on your sidewalk melts when you put salt on it. A glass of water evaporates overnight when it is left on the bedside table. Your steak chars if the skillet is too hot. Alcohol feels cool when it is spilled on the skin. Alcohol ignites when a flame is brought near it. Baking powder causes biscuits to rise.

Question

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Answer 1

Textbook Question

Chapter 3, Problem 19CR

Which of the following represent physical properties or changes, and which represent chemical properties or changes?

You curl your hair with a curling iron.

You curl your hair by getting a “permanent wave” at the hair salon.

Ice on your sidewalk melts when you put salt on it.

A glass of water evaporates overnight when it is left on the bedside table.

Your steak chars if the skillet is too hot.

Alcohol feels cool when it is spilled on the skin.

Alcohol ignites when a flame is brought near it.

Baking powder causes biscuits to rise.

Expert Solution

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Expert Solution

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Expert Solution

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Expert Solution

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Expert Solution

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Expert Solution

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Expert Solution

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Expert Solution

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.

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Answer 2

Textbook Question

Chapter 3, Problem 19CR

Which of the following represent physical properties or changes, and which represent chemical properties or changes?

You curl your hair with a curling iron.

You curl your hair by getting a “permanent wave” at the hair salon.

Ice on your sidewalk melts when you put salt on it.

A glass of water evaporates overnight when it is left on the bedside table.

Your steak chars if the skillet is too hot.

Alcohol feels cool when it is spilled on the skin.

Alcohol ignites when a flame is brought near it.

Baking powder causes biscuits to rise.

Expert Solution

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Expert Solution

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Expert Solution

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Expert Solution

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Expert Solution

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Expert Solution

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Expert Solution

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Expert Solution

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 3, Problem 19CR

Which of the following represent physical properties or changes, and which represent chemical properties or changes?

You curl your hair with a curling iron.

You curl your hair by getting a “permanent wave” at the hair salon.

Ice on your sidewalk melts when you put salt on it.

A glass of water evaporates overnight when it is left on the bedside table.

Your steak chars if the skillet is too hot.

Alcohol feels cool when it is spilled on the skin.

Alcohol ignites when a flame is brought near it.

Baking powder causes biscuits to rise.

Expert Solution

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Expert Solution

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Expert Solution

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Expert Solution

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Expert Solution

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Expert Solution

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Expert Solution

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Expert Solution

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 3, Problem 19CR

Which of the following represent physical properties or changes, and which represent chemical properties or changes?

You curl your hair with a curling iron.

You curl your hair by getting a “permanent wave” at the hair salon.

Ice on your sidewalk melts when you put salt on it.

A glass of water evaporates overnight when it is left on the bedside table.

Your steak chars if the skillet is too hot.

Alcohol feels cool when it is spilled on the skin.

Alcohol ignites when a flame is brought near it.

Baking powder causes biscuits to rise.

Expert Solution

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Expert Solution

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Expert Solution

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Expert Solution

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Expert Solution

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Expert Solution

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Expert Solution

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Expert Solution

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.

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Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Expert Solution

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Expert Solution

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Expert Solution

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Expert Solution

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Expert Solution

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Expert Solution

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Expert Solution

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.

Answer 8

Expert Solution

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Answer 9

Expert Solution

Answer 10

Expert Solution

Answer 11

Expert Solution

Answer 12

Interpretation Introduction

(a)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 13

Answer to Problem 19CR

Curling hair with a curling iron is a physical change.

Answer 14

Explanation of Solution

Curling iron with a curling iron does not make any change in fundamental components that make up hair. It just changes the appearance of hair which is a physical property. So curling up hair is a physical change.

Answer 15

Expert Solution

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Answer 16

Expert Solution

Answer 17

Expert Solution

Answer 18

Expert Solution

Answer 19

Interpretation Introduction

(b)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 20

Answer to Problem 19CR

Curling hair by getting a “permanent wave” is a chemical change.

Answer 21

Explanation of Solution

A permanent wave, involves the use of heat and chemicals to break and reform the cross-linking bonds of the hair structure. A chemical solution is applied on hair and this solution reacts chemically softening the inner structure of the hair by breaking some of the cross links within and between the protein chains of the hair. So getting permanent wave is a chemical change.

Answer 22

Expert Solution

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Answer 23

Expert Solution

Answer 24

Expert Solution

Answer 25

Expert Solution

Answer 26

Interpretation Introduction

(c)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 27

Answer to Problem 19CR

Melting of ice when salt is put on it is a physical change.

Answer 28

Explanation of Solution

Salt causes “freezing point depression”, i.e. salt helps in lowering the freezing point and, consequently, the melting point of water. Water freezes at 0°C or 32°F. By using salt, that freezing point can be lowered which causes the ice to melt.

Answer 29

Expert Solution

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Answer 30

Expert Solution

Answer 31

Expert Solution

Answer 32

Expert Solution

Answer 33

Interpretation Introduction

(d)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 34

Answer to Problem 19CR

Evaporating glass of water overnight is a physical change.

Answer 35

Explanation of Solution

When water evaporates, it changes its physical state from liquid state to the gaseous state. Evaporation of water does not make any change to the fundamental components of water, which is H₂ O. So evaporation of water is a physical change.

Answer 36

Expert Solution

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Answer 37

Expert Solution

Answer 38

Expert Solution

Answer 39

Expert Solution

Answer 40

Interpretation Introduction

(e)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 41

Answer to Problem 19CR

Charring of steak, when the skillet gets too hot is a chemical change.

Answer 42

Explanation of Solution

When the skillet gets too hot, because of the high temperature, components of steak like proteins, carbohydrates are chemically changed. So the steak is no longer in its original form. So this is a chemical change.

Answer 43

Expert Solution

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Answer 44

Expert Solution

Answer 45

Expert Solution

Answer 46

Expert Solution

Answer 47

Interpretation Introduction

(f)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 48

Answer to Problem 19CR

Alcohol feels cool when it splits on skin due to a physical change.

Answer 49

Explanation of Solution

When alcohol splits on the skin, it evaporates quickly using the body temperature. Due to the sudden decrease of body temperature we feel cool. And because alcohol changes its physical state from liquid state to gaseous state, this is a physical change.

Answer 50

Expert Solution

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Answer 51

Expert Solution

Answer 52

Expert Solution

Answer 53

Expert Solution

Answer 54

Interpretation Introduction

(g)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 55

Answer to Problem 19CR

Ignition of alcohol is a chemical change.

Answer 56

Explanation of Solution

When alcohol ignites, it reacts with oxygen in the air and converted into carbon dioxide and water. So the components of alcohol are changed. So this is a chemical change.

Answer 57

Expert Solution

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.

Answer 58

Expert Solution

Answer 59

Expert Solution

Answer 60

Expert Solution

Answer 61

Interpretation Introduction

(h)

Interpretation:

It should be discussed, that whether the given statement is a physical property or a change or chemical property or a change.

Concept Introduction:

Physical properties can be observed or measured without changing the composition of matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity etc. a physical change involves a change in one or more physical properties but no change in the fundamental components that make up the substance. The most common physical changes are changes of state: solid, liquid or gas.

A chemical change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances. Chemical changes are called reactions.

Answer 62

Answer to Problem 19CR

Baking powder causes the biscuits to rise due to a chemical change.

Answer 63

Explanation of Solution

Baking powder’s chemical name is sodium bicarbonate. When sodium carbonate and other materials are heated a chemical reaction undergoes and converts sodium bicarbonate into sodium carbonate, carbon dioxide and water. This carbon dioxide causes the biscuits to rise. So this is a chemical change.