Chapter 4, Problem 57P

Interpretation Introduction

(a)

Interpretation:

State true or false for the following statement: Heat of reaction is the heat given off or absorbed by a chemical reaction.

Concept Introduction:

The heat given off or absorbed in a chemical reaction is known as heat of reaction.

Interpretation Introduction

(b)

Interpretation:

State true or false for the following statement: An endothermic reaction is one that gives off heat.

Concept Introduction:

An endothermic reaction is the reaction which absorb heat.

Interpretation Introduction

(c)

Interpretation:

State true or false for the following statement: If a chemical reaction is endothermic, the reverse reaction is exothermic.

Concept Introduction:

A reaction that gives off heat is called exothermic reaction and the reaction that absorb heat is called endothermic reaction.

Interpretation Introduction

(d)

Interpretation:

State true or false for the following statement: All combustion reactions are exothermic.

Concept Introduction:

A combustion reaction is the reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light.

Interpretation Introduction

(e)

Interpretation:

State true or false for the following statement: If the reaction of glucose (${\text{C}}_6{\text{H}}_{12}{\text{O}}_6$) and ${\text{O}}_2$ in the body to give $\text{C}{\text{O}}_2$ and ${\text{H}}_2\text{O}$ is an exothermic reaction, then photosynthesis in green plants (the reaction of $\text{C}{\text{O}}_2$ and ${\text{H}}_2\text{O}$ to give glucose and ${\text{O}}_2$) is an endothermic process.

Concept Introduction:

A reaction that gives off heat is called exothermic reaction and the reaction that absorb heat is called endothermic reaction.

Interpretation Introduction

(f)

Interpretation:

State true or false for the following statement: The energy required to drive photosynthesis comes from the sun in the form of electromagnetic radiation.

Concept Introduction:

Photosynthesis is the process plants use the energy from sunlight to produce glucose from carbon dioxide and water.