How latent heat of fusion is related to melting point

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Solution

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.

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