Understanding Heat Capacities

What is the definition of specific heat capacity?

• The heat required to change a substance from solid to liquid.

• The temperature at which a substance changes its state.

• The total heat energy contained in a substance.

• The amount of heat required to raise the temperature of one unit mass of a substance by one degree Celsius.

How do you calculate the specific heat capacity of a substance?

• c = Q / (m * ΔT)

• c = ΔT / (m * Q)

• c = Q * m + ΔT

• c = m * ΔT / Q

What is the latent heat of fusion and how is it defined?

• The latent heat of fusion is the energy required to freeze a liquid into a solid.

• The latent heat of fusion is the temperature at which a solid melts.

• The latent heat of fusion is the energy released when a gas condenses into a liquid.

• The latent heat of fusion is the heat energy needed to convert a solid into a liquid at its melting point.

Explain the concept of latent heat of vaporization.

• Latent heat of vaporization is the heat energy needed to convert a liquid into vapor at constant temperature.

• Latent heat of vaporization is the energy required to freeze a liquid into a solid.

• Latent heat of vaporization is the heat energy released when a gas condenses into a liquid.

• Latent heat of vaporization is the temperature at which a liquid boils.

What are some practical applications of latent heat in everyday life?

• Storing food in a vacuum-sealed bag

• Using a microwave to freeze food

• Heating a room with a fireplace

• Practical applications of latent heat include cooking (boiling water), refrigeration (phase change in refrigerants), and air conditioning (evaporative cooling).