Chap 9: First Law of Thermodynamics

Question 1

Specific heat capacity:

Answer 1

Thermal energy transferred per unit mass per unit change in temperature.

Question 2

● Specific latent heat:

Answer 2

Thermal energy transferred per unit mass during the change of state at constant temperature.

Question 3

● Specific latent heat of fusion:

Answer 3

Thermal energy transferred per unit mass during the change of state between solid and liquid at constant temperature.

Question 4

● Specific latent heat of vaporisation:

Answer 4

Thermal energy transferred per unit mass during the change of state between liquid and gas at constant temperature.

Question 5

● Internal energy of a system:

Answer 5

Sum of the random distribution of kinetic and potential energies associated with the molecules of the system.

Question 6

● First law of thermodynamics:

Answer 6

Increase in internal energy of the system is equal to the sum of the heat supplied to the system and the work done on the system.