2022 CHEM FINAL REVIEW heat specific heat capacity

Front

What is specific heat capacity?

Back

Specific heat capacity is the amount of energy required to raise the temperature of 1 kilogram of a substance by 1°C.

Front

What is the formula to calculate heat energy?

Back

Q = mc∆t, where Q is heat energy, m is mass, c is specific heat capacity, and ∆t is the change in temperature.

Front

What does the term 'calorimetry' refer to?

Back

Calorimetry is the measurement of the transfer of heat into or out of a system (reaction/process).

Front

How much heat energy is needed to heat 2400g of water from 25°C to 100°C?

Back

752,400 J.

Front

What is the specific heat of water?

Back

The specific heat of water is 4.18 J/(g°C).

Front

If a 10g piece of platinum cools from 100°C to 50°C, how much heat is released?

Back

66.5 J.

Front

What is the specific heat of platinum?

Back

The specific heat of platinum is 0.133 J/g°C.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact do not exchange heat, meaning they are at the same temperature.

Front

What is the change in temperature (∆t) if the initial temperature is 25°C and the final temperature is 100°C?

Back

∆t = 100°C - 25°C = 75°C.

Front

What is the unit of specific heat capacity?

Back

The unit of specific heat capacity is J/(g°C).