Specific Heat Capacity and Phase Changes

Front

A substance with a low specific heat heats up __________, while a substance with a high specific heat heats up __________.

Back

Quickly, slowly

Front

What is specific heat capacity?

Back

The amount of heat required to raise the temperature of one gram of a substance by 1°C

Front

The specific heat of copper is 0.39 J/g °C. What is the temperature change when 100. Joules of heat is added to 20.0 grams?

Back

12.8°C

Front

The specific heat of platinum is 0.133 J/g°C. How much heat is released when a 10.0 g piece of platinum cools from 100.0°C to 50.0°C?

Back

-66.5 J

Front

Calculate the amount of energy required to melt 35 grams of ice. ΔHf = 80.0 cal/g, ΔHv = 560.0 cal/g, c = 1.00 cal/gºC.

Back

2,800 cal

Front

Define specific heat capacity.

Back

Specific heat capacity is the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree Celsius.

Front

What is the formula for calculating heat energy (Q)?

Back

Q = mcΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature.

Front

What happens to the temperature of a substance during a phase change?

Back

The temperature remains constant during a phase change, even though heat is added or removed.

Front

What is latent heat?

Back

Latent heat is the heat required to change the phase of a substance without changing its temperature.

Front

What is the specific heat of water?

Back

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