Heat of Fusion
What is it?
Heat of fusion is the change in enthalpy (or heat) needed to convert one mole of a substance from a solid to a liquid at its melting point.
Give me an example!
When a solid substance reaches its heat of fusion, the bonds that hold its molecules together in a solid structure break down and it becomes a liquid. You might say that the bonds are no longer fused together at the heat of fusion.
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