FA22 Energy and Specific Heat

Front

What happens to the particles in a substance when heat is added?

Back

The particles speed up.

Front

What is specific heat capacity?

Back

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

Front

How do you calculate the heat absorbed or released by a substance?

Back

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

Front

What is the specific heat capacity of water?

Back

4.18 J/g°C.

Front

If a metal has a specific heat capacity of 2.56 J/g°C, what does this mean?

Back

It means that 2.56 joules of heat are required to raise the temperature of 1 gram of the metal by 1°C.

Front

How do you find the final temperature of a system in calorimetry?

Back

Use the principle of conservation of energy: heat lost by the hot object = heat gained by the cold object.

Front

What is the formula for calculating the mass of a substance using specific heat?

Back

m = Q / (cΔT), where m is mass, Q is heat, c is specific heat capacity, and ΔT is the change in temperature.

Front

What is calorimetry?

Back

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

Front

How many joules are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C with a specific heat of 0.90 J/g°C?

Back

297 Joules.

Front

What is the specific heat capacity of iron if a 15.75-g piece absorbs 1086.75 joules of heat and its temperature changes from 25°C to 175°C?

Back

0.46 J/g°C.