Specific Heat Review

Front

What is specific heat?

Back

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

Front

What is the specific heat of water?

Back

The specific heat of water is 4,186 J/kg∙°C.

Front

How do you calculate heat absorbed or released?

Back

Heat (Q) = mass (m) × specific heat (c) × change in temperature (ΔT).

Front

What is the formula for calculating the change in temperature?

Back

ΔT = final temperature - initial temperature.

Front

If 1.2 kg of water is heated from 23 °C to 39 °C, how much heat is required?

Back

Q = 1.2 kg × 4,186 J/kg∙°C × (39 °C - 23 °C) = 80,371.2 J.

Front

What is the heat absorbed by 105.0 grams of water heated from 20.0 °C to 99.0 °C?

Back

Q = 105.0 g × 4.18 J/g∙°C × (99.0 °C - 20.0 °C) = 34,673 J.

Front

What effect does a large body of water have on nearby land temperatures?

Back

It causes cooler summers and warmer winters due to its high specific heat.

Front

How do you find the specific heat of a substance?

Back

Specific heat (c) = heat absorbed (Q) / (mass (m) × change in temperature (ΔT)).

Front

What is the specific heat of a metal if 30.00 g absorbs 350.0 J and its temperature changes from 25.0 °C to 35.0 °C?

Back

c = 350.0 J / (30.00 g × (35.0 °C - 25.0 °C)) = 1.17 J/g°C.

Front

How does water's specific heat affect temperature changes compared to land?

Back

Water's surface temperature changes more slowly because it has a higher specific heat.