Flexi Says: Latent heat of fusion is the enthalpy change of any amount of substance when it melts. All solids absorb heat as they melt to become liquids. The gain of heat in this endothermic process goes into changing the state rather than changing the temperature. The molar heat of fusion (ΔHfus) of a substance is the heat absorbed by one mole of that substance as it is converted from a solid to a liquid. The mass of the sample is first converted to moles. This is then multiplied by the conversion factor for energy/ mol in order to find the kJ of heat absorbed.
