Chapter 10 Calorimetry, Specific Heat & Heat Capacity

What is calorimetry? The measurement of heat changes.

What is a calorimeter? A device used to measure heat changes.

What is specific heat (s)? The heat required to raise 1 g of a substance by 1°C.

What is heat capacity (C)? The heat required to raise an object by 1°C.

What is the formula for heat using specific heat? q = msΔT.

What does m represent in q = msΔT? Mass.

What does s represent in q = msΔT? Specific heat.

What does ΔT represent in q = msΔT? Temperature change.

How do you calculate temperature change? ΔT = Tfinal − Tinitial.

What is a coffee-cup calorimeter? A constant-pressure calorimeter.

In coffee-cup calorimetry, what is usually the system? The reaction.

In coffee-cup calorimetry, what are usually the surroundings? The water.

For an exothermic reaction, does the system gain or lose heat? Lose heat.

For an exothermic reaction, do the surroundings gain or lose heat? Gain heat.

What is a bomb calorimeter? A constant-volume calorimeter.

What type of reactions are commonly studied in bomb calorimeters? Combustion reactions.

Why is a bomb calorimeter considered isolated? No heat is exchanged with the surroundings.

What must be known before using a bomb calorimeter? The calorimeter heat capacity.

What relationship exists between heat lost and heat gained? qlost = -qgained.

What is the most common equation used in calorimetry problems? q = msΔT.