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Enthalpy
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====Physical properties==== [[Enthalpy of fusion]] is defined as the enthalpy change required to completely change the state of one mole of substance from solid to liquid. [[Enthalpy of vaporization]] is defined as the enthalpy change required to completely change the state of one mole of substance from liquid to gas. [[Enthalpy of sublimation]] is defined as the enthalpy change required to completely change the state of one mole of substance from solid to gas. [[Lattice enthalpy]] is defined as the energy required to separate one mole of an ionic compound into separated gaseous ions to an infinite distance apart (meaning no force of attraction). [[Enthalpy of mixing]] is defined as the enthalpy change upon mixing of two (non-reacting) chemical substances.
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