Define and explain the standard enthalpy of vapourisation of sublimation.

Explanation

Standard enthalpy of sublimation `(triangle_("sub") H^0):` It is the change in the enthalpy when are mole of a solid substance sublimes at a constant temperature under standard pressure.
`Eg : underset("Dry ice")(CO_(2(s)) overset(195K)to underset("vapour")(CO_(2)) underset("Sub") (H^0)="25.2 KJ mol"^(-1)`