Suppose you heated a sample of 12.20 grams of water at its boiling point until it completely vaporized. How many kilojoules of heat were used for the vaporization process? Given AHvap = 40.6 kJ/mol

Q: If 27.5 g of MgCl₂ are dissolved 500.0 g of water at 20.0 °C in an insulated container, a…

A: Given that, The mass of the MgCl2 is 27.5 g. The mass of the water is 500.0 g. So, the total mass of…

Q: Benzene (C6H6) is an organic compound that boils at 80.1°C. If 100.0 grams of liquid benzene at…

A: The heat of Vapourisation is the amount of energy that must be added to the liquid substance to…

Q: The heat capacity of liquid ethanol is 2.45 J/g-deg C. How much heat do you need to add to 100 g of…

A: Given: Specific heat capacity of ethanol = 2.45 J/g⋅ oC Mass of ethanol = 100.0 g Initial…

Q: The enthalpy of fusion (ΔHfus) for aluminum is 8.66 kJ/mol. How much energy (in kJ) is released when…

A:

Q: 4. Find the temperature at which water boils on a day in the mountains when the barometric pressure…

A: we have to calculate the boiling point of water at the mountains where pressure is 593 mmHg

Q: How many kilojoules of heat energy are going to be absorbed by a pot of water with the mass of 200.…

A: q = mc∆T  q is the amount of heat energy absorbed m is the mass of substance  c is the specific heat…

Q: Substance Specific Heat, c (J/gx°C) Water 4.184 Granite 0.803 Mercury 0.140 Silver 0.235 Aluminum…

A: Using the relation Q = mCΔT we can find amount of heat released.

Q: How much heat is released when 30 g of water at 96°C cools to 25°C? The specific heat of water is…

A:

Q: How many kJ of heat is needed to raise the temperature of 0.250 L of water in t liquid phase from…

A: Volume of water V = 0.250 LT1 = 24.6 oCT2 = 46.2 oC

Q: Silicon, used in computer chips, has a heat capacity of 0.712 J·g-1·°C-1. If  500  J of heat is…

A: Given: Heat capacity of silicon = 0.712 J g-1 °C-1 Absorbed heat = 500 J Mass of silicon = 8.13 g…

Q: When 11.55 grams of ammonium nitrate (NH4NO3) are dissolved in 100.0 grams of water at 25.0 °C in an…

A: Given: Mass of NH4NO3 = 11.55 g Mass of water = 100 g Initial temperature = 25oC Final temperature =…

Q: 115.4 g of water, H2O, (molar mass is 18.02 g/mol) was heated from -11.54 °C to 135.72 °C. The…

A: The specific heat of a substance is the amount of heat required to raise the temperature of a…

Q: Water has a heat of vaporization (ΔHvap) of 40.8 kJ/mol. What is the change in energy of 10.0 g of…

A: The amount of heat required by water to change from liquid phase to vapor phase by means of…

Q: In an ideal calorimeter, 10.00 mL of 3.00 M NH3 is reacted with 5.000 mL of 3.00 M HNO3. The initial…

A: Heat energy associated with this rise in temperature = m*C* ΔT where  m = mass of the solution C =…

Q: What quantity of heat energy (in Joules) is required to raise the temperature of 454g of tin from…

A:

Q: How much heat (kJ) is absorbed by 948.0 g of water in order for the temperature to increase from…

A:

Q: How much heat is required to vaporize 100.0 g of ethanol

A: Number of moles = mass ÷ molar mass  Molar mass of ethanol is 46.07 g/mol

Q: How much heat (in kilojoules) is gained by 231 grams of water that is warmed from 25.00C to 39.00C?…

A: Given: Mass of water=231 g Temperature change, ∆T=(39.0-25.0)°C=14 °C The heat gained q =? kJ…

Q: How much heat (in Joules) is gained by 447 grams of water that is warmed from 25.0 J °C to 54.0°C?…

A: The amount of heat absorbed (or released) by fixed amount of a substance to change its temperature…

Q: If 29.00 g of aluminum at 76.45 °C is dropped into 125.7 g of water at 34.04 °C, what will be the…

A:

Q: If 10 g of water at 52oC and 25 g of water at 10oC were mixed in an insulated container, what will…

A: Given: Specific heat of water = 4.184 J/g°C

Q: Calculate the amount of heat, in Joules, needed to raise 34.0g of water from 55.0°C to 76.0°C. The…

A: Here we are required to find the amount of heat needed to raise 34.0g of water from 55.0°C to 76.0°C…

Q: A common technique for forming metal electrodes on electronic devices is evaporation in a vacuum. In…

A: Given Data: The enthalpy of vaporization (ΔHvap) for gold = 310.9 kJ/mol given mass of  liquid gold…

Q: The specific heat of mercury is 0.140 J/g°C. Calculate the heat necessary to raise the temperature…

A:

Q: What is the amount of heat energy in joules required to raise the temperature of 10.00 g water…

A: The required relation is given below.

Q: 50.0 mL of hot water (49.6 oC) is added to 50.0 mL of cold water (24.7 oC).  Upon mixing the water…

A: Mass of hot water = 50 mL =50g Temperature of hot water = 49.5°C Mass of cold water = 50 mL = 50 g…

Q: Calculate the total energy in kJ required to change the temperature of 591 g water from 96.0  oC to…

A: The process of cooling water from  96.0  oC to -111 oC will have below steps. 1) cooling hot water…

Q: 67.0 mL of hot water (45.4 oC) is added to 45.0 mL of cold water (22.3 oC).  Upon mixing the water…

A:

Q: Water exists as a liquid at room temperature (25.0°C). If 300 kJ of heat energy is added to 100 g…

A: Answer:Increasing the temperature of liquid water up to its boiling pointVaporization of…

Q: When 6.72 grams of potassium chlorate (KCIO3) are dissolved in 120.0 grams of water at 25.0 °C in an…

A:

Q: How much heat (in kilojoules) is gained by 294 grams of water that is warmed from 25.00C to 57.00C?…

A:

Q: What is the total heat flow if 40 grams of steam at 143°C is cooled to become water at 34°C? The…

A: mass = 40g  specific heat of steam is 2.0 J/g • °C   specific heat of water is 4.18 J/g • °C heat of…

Q: In an experiment designed to measure the heat of fusion of ice, 25 grams of ice at 0oC is dropped…

A: Given: Mass of hot water = 200 g. Initial temperature of water and calorimeter = 30.0 oC Mass of…

Q: What is the heat capacity of 2.63 mol of liquid water?   How many kJ of heat are needed to raise…

A: Specific heat capacity of liquid water = 4.184 J/gm°C  Hence, 2.63 moles = 2.63*18 = 47.34 gm  So,…

Q: How much heat must be absorbed by 375 grams of water to raise its temperature by 25° C? Specific…

A: Given, mass = 375 g  Specific heat, c = 4.184 J/g°C  Heat = ?

Q: A 466 g of water is heated from 8.50C to 74.60C. Calculate the amount of heat absorbed (in…

A: Given,  Mass of water = 466 g  Heat absorbed = ?

Q: Calculate the heat change in joules for vaporization of 9.00 g of water at 100 ∘C.

A: Heat of vaporisation of water is 2256 J/g/0C.Thus, when 1 mol ( 18 g) of water is vaporised, 2256…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.