Thermal Physics

Question 1

Internal Energy

Answer 1

The internal energy is a function of state and the total microscopic kinetic and potential energies of the particles composing the system.

Question 2

Specific Latent Heat of Fusion

Answer 2

The specific latent heat of fusion, Lf , is defined as the amount of heat required per unit mass to change a substance from the solid phase to the liquid phase without any change in temperature

Question 3

Specific Latent Heat of Vaporisation

Answer 3

The specific latent heat of vaporisation, Lv, is defined as the amount of heat required per unit mass to change a substance from the liquid phase to the vapour phase without any change in temperature.

Question 4

First law of thermodynamics

Answer 4

First law of thermodynamics state that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done on system.