Calorimetry
Chemistry ⇒ Thermochemistry and Energetics
Calorimetry starts at 10 and continues till grade 12.
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Describe one real-life application of calorimetry outside the laboratory.
Describe the main difference between a bomb calorimeter and a coffee cup calorimeter.
Describe the principle of conservation of energy as it applies to calorimetry.
Explain why a bomb calorimeter is considered a constant volume device.
A 10 g sample of ice at 0°C is added to 100 g of water at 30°C. What is the final temperature of the mixture? (Latent heat of fusion of ice = 334 J/g, specific heat of water = 4.18 J/g°C)
A 150 g sample of a metal at 80°C is placed in 100 g of water at 20°C. The final temperature is 25°C. If the specific heat capacity of water is 4.18 J/g°C, calculate the specific heat capacity of the metal.
A 200 g sample of water is cooled from 80°C to 30°C. How much heat is lost by the water? (Specific heat capacity of water = 4.18 J/g°C)
A 250 g solution absorbs 5000 J of heat, causing its temperature to rise by 10°C. What is the specific heat capacity of the solution?
Which device is commonly used to measure heat changes in a chemical reaction? (1) Thermometer (2) Calorimeter (3) Barometer (4) Voltmeter
Which of the following best describes an endothermic reaction? (1) Releases heat (2) Absorbs heat (3) No heat change (4) Increases pressure
Which of the following is a reason for using an insulated container in calorimetry? (1) To allow heat exchange with the environment (2) To prevent heat loss or gain from surroundings (3) To increase the reaction rate (4) To measure pressure changes
Which of the following is an exothermic process? (1) Melting of ice (2) Combustion of methane (3) Evaporation of water (4) Boiling of ethanol
Fill in the blank: The energy change per mole of a substance during a reaction at constant pressure is called __________ change.
Fill in the blank: The heat change at constant pressure is called __________.
Fill in the blank: The heat change that occurs without a change in temperature is called __________ heat.
Fill in the blank: The heat required to change 1 gram of a solid into a liquid at its melting point is called __________.
True or False: Calorimetry can be used to determine the specific heat capacity of an unknown metal.
True or False: In an exothermic reaction, the temperature of the surroundings increases.
True or False: The bomb calorimeter is used to measure the heat of combustion reactions.
True or False: The calorimeter constant is the amount of heat required to raise the temperature of the calorimeter by 1°C.
