Enthalpy of Fusion

Enthalpy of fusion is the amount of energy required to convert a substance from solid to liquid at its melting point, without changing its temperature. It represents the heat needed to break the bonds holding the particles in a fixed, solid structure so they can move freely as a liquid. Think of it as the “melting energy” necessary to turn ice into water. This value varies depending on the material; for example, water requires 334 joules per gram to melt. Enthalpy of fusion is important in understanding phase changes and energy calculations in thermodynamics.