Explain the following terms.
(i) Latent heat of fusion
(ii) Latent heat of vaporisation
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1. Latent heat of fusion:
- The quantity of heat required to convert unit mass of a substance from its solid state to the liquid state, at its melting point, without any change in its temperature is called its latent heat of fusion.
- The S.I. unit of latent heat of fusion is J/kg and its C.G.S. unit is cal/’g.
2. Latent heat of vaporisation:
- The quantity of heat required to convert unit mass of a substance from its liquid state to vapour state, at its boiling point, without any change in its temperature is called its latent heat of vaporisation.
- The S.I. unit of latent heat of vaporization is J/kg and its C.G.S unit is cal/g.