Question

what is mean by specific latent heat of fusion ?​

Answer 1

specific latent of heat of fusion :-

The amount of heat energy absorbed at constant temperature by unit mass of a solid to convert into liquid phase is called specific latent heat of fusion

Answer 2

The specific latent heat of fusion for that material. So the formula tells us how much heat energy is needed to go into a material to change it from a solid to a melted liquid.