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Define enthalpy of sublimation. How is i...

Define enthalpy of sublimation. How is it related to enthalpy of fusion and enthalpy of vaporization?

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The enthalpy change that accompanies the conversion of one mole of solid directly into its vapour at constant temperature is called as enthalpy of sublimation.
`Delta_(sub) H = Delta_(fus) H + Delta_(vsp) H`
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