Question

What do you understand by the term specific latent heat of fusion? State its CGS and SI unit.

Answer 1

Specific Latent Heat of Fusion:

1. The quantity of heat energy required to melt 1 kg of a solid(1 g in case of CGS system) at its melting factor without any rise in temperature is named as specific latent heat of fusion.
2. Specific latent heat of fusion is described as the amount of heat energy required to convert the unit mass of a substance from solid to liquid state at atmospheric pressure without a change in temperature.
3. The CGS unit of specific latent heat of fusion is expressed in Jg^-1(calories g^-1 in the old system).
4. The SI unit of specific latent heat of fusion is expressed in Jkg^-1(calories kg^-1 in the old system).