Enthalpy of
Fusion (Melting)
Enthalpy of Fusion is
defined as the heat that is
absorbed when the melting
occurs at constant pressure. If the substance freezes, the
reaction is reversed, and an equal amount of heat is given
off to the surroundings; i.e., ![](space.gif)
ΔHfreez =
- ΔHfus
Melting (fusion)
is an endothermic process
solid
liquid