Heat energy absorbed at constant temperature during transformation of solid into liquid : Latent heat of fusion : : Amount of heat energy absorbed at constant temperature by unit mass of a solid to convert into liquid : __

Explanation

Specific latent heat of fusion
The heat energy absorbed at constant temperature during transformation of solid into liquid is called the latent heat of fusion. Similarly, the amount of heat energy absorbed at constant temperature by unit mass of a solid to convert into liquid phase is called the specific latent heat of fusion.