Question

What do you understand by latent heat of fusion and how it is related to melting point?

Answer 1

The amount of heat energy released or absorbed when a solid changing to liquid at atmospheric pressure at its melting point is known as the latent heat of fusion.
Ex:
The latent heat of fusion of water is 79.72 cal/gram (or) 334.0 kJ/Kg

This heat supplied to the solid at itsmelting point is latent heat of fusion. It is defined as the heat energy required for completely changing 1 kg of a solid into liquid state at atmospheric pressure
After a substance is raised to the temperature of melting point, the heat added after this point doesn’t raise the temperature of the substance, rather it is used completely to change the phase of the substance from solid to liquid. This heat supplied to the solid at its melting point is latent heat of fusion.