Question

what is latent heat of fusion

Answer 1

Latent heat of fusion is the quantity of heat in joules required to convert 1 kilogram of solid into the liquid without any change in temperature.

Answer 2

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The latent heat of fusion is the enthalpy change of any amount of substance when it melts. When the heat of fusion is referenced to a unit of mass, it is usually called the specific heat of fusion, while the molar heat of fusion refers to the enthalpy change per amount of substance in moles.