Specific Heat Problems

Front

What is specific heat?

Back

Specific heat is the amount of heat required to raise the temperature of 1 kilogram of a substance by 1 degree Celsius.

Front

How does heat flow?

Back

Heat flows from warm to cold.

Front

What is the formula to calculate heat (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/(kg·°C).

Front

How do you convert grams to kilograms?

Back

To convert grams to kilograms, divide the number of grams by 1000.

Front

What is the change in temperature (ΔT) when cooling from 100°C to 50°C?

Back

ΔT = 100°C - 50°C = 50°C.

Front

How much heat is released when 10 kg of aluminum cools from 100°C to 50°C?

Back

Q = mcΔT = 10 kg * 0.21 cal/kg°C * 50°C = 1050 cal (or 105 J).

Front

What is the specific heat of aluminum?

Back

The specific heat of aluminum is 0.21 cal/g°C.

Front

What is the unit of specific heat?

Back

The unit of specific heat is typically J/(kg·°C) or cal/(g·°C).

Front

If 10,000 grams of water is heated from 20°C to 90°C, how much energy is required?

Back

2926 J.