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A materials heat of funsion gives the ammount of energy needed to?
Wiki User
∙ 14y ago
The heat of fusion, also known as the enthalpy of fusion is how much energy is required to melt a solid to a liquid. This is the energy required to change the phase of the material - not the temperature. In fact at the melting point the heat capacity becomes infinite because all the energy is being used to change state and not temperature.
As energy cannot be created or destroyed it is reasonable to assume it is the same amount of energy for a liquid to turn into a solid, which it is.
So if energy is needed to change the phase of ice into water, the same amount of energy is released when water changes back into ice.
Wiki User
∙ 14y ago
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