Question

Why does the heat supply to a substance during its change of state not cause any rise in its temperature?

Answer 1

Latent heat

1. When we start supplying heat to any substance, its temperature will increase.
2. The temperature will not increase after supplying heat, this means the substance is changing its state.
3. During state change, the amount of heat energy is used to change the phase of the substance and this amount of supplied heat will be known as Latent Heat.
4. The latent heat is not responsible to make changes in the temperature of the substance.
5. The SI unit of latent heat is$J/kg.$