CSEC Physics Section B: Thermal Physics and Kinetic Theory

Specific heat capacity is the energy required to

• change unit mass of a substance to solid

• heat unit mass of a substance by unit temperature

• change unit work to unit temperature

• heat a substance by unit temperature

Specific latent heat is associated with temperature changes

• True

• False

Answer explanation

Specific latent heat is used when dealing with phase changes. Specific heat capacity is used for temperature changes

Specific heat capacity is an extensive property

• True

• False

Answer explanation

Specific heat capacity is an intensive property meaning it does not depend on the amount of the substance present

When the gradient of a heating curve is zero then there is a change in temperature.

• True

• False

Answer explanation

A gradient of zero implies a phase change whereas a positive or negative gradient indicates temperature change

The specific heat capacity of water in Joules per kilogram per Kelvin is

• 2700

• 4200

• 13600

• 19300

The pressure law states that the pressure of a varying mass of gas is directly proportional to the absolute temperature

• True

• False

Answer explanation

For each of the gas laws we consider a fixed mass of gas not a varying mass

Charles' Law describes the relationship between volume and absolute temperature

• True

• False

Answer explanation

The volume of a fixed mass of gas is directly proportional to its absolute temperature