11. Thermal Physics

Question 1

Specific Heat Capacity

Answer 1

The energy needed to raise the temperature of unit mass of the substance by 1K without change of state.

Question 2

Internal Energy

Answer 2

The sum of the random distribution of the kinetic and potential energies of an object’s molecules.

Question 3

Heat Transfer

Answer 3

Convection conduction or radiation that occurs due to a temperature difference

Question 4

Work done

Answer 4

When an object exerts a force on the other and makes it move

Question 5

Absolute scale

Answer 5

Measured in terms of absolute zero and the triple point of water, 273.16K which is the temperature at which ice, water and water vapour coexist in thermal equilibrium.

Question 6

Specific latent heat of fusion

Answer 6

Energy needed to change the state of unit mass of the substance from solid to liquid without change of temperature

Question 7

Specific latent heat of vaporisation

Answer 7

Energy needed to change the state of unit mass of the substance from liquid to vapour without change of temperature