Specific Heat Review

Front

What is specific heat?

Back

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

Front

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

Back

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

Front

What is the specific heat of water?

Back

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

Front

How do you calculate the change in temperature (ΔT)?

Back

ΔT = final temperature - initial temperature.

Front

What is the unit of specific heat?

Back

The unit of specific heat is J/g°C.

Front

What does a high specific heat indicate about a substance?

Back

A high specific heat indicates that a substance can absorb a lot of heat without a significant change in temperature.

Front

What is calorimetry?

Back

Calorimetry is the science of measuring the heat of chemical reactions or physical changes.

Front

What is the relationship between heat lost and heat gained in a calorimetry problem?

Back

In a closed system, the heat lost by the hot object equals the heat gained by the cold object.

Front

If 100 g of water at 20°C is heated to 80°C, how much energy is absorbed?

Back

Q = mcΔT = 100 g * 4.18 J/g°C * (80°C - 20°C) = 25,050 J.

Front

What is the specific heat capacity of a substance if it requires 500 J to raise the temperature of 50 g by 10°C?

Back

c = Q/(mΔT) = 500 J / (50 g * 10°C) = 1 J/g°C.