Define and explain the standard enthalpy of vapourisation (Molar enthalpy of vapourisation).

Explanation

Standard molar enthalpy of vapourisation `(triangle_("vap") H^0):` Amount of heat required to vapourise 1 mole of a liquid at constant temperature and under standard pressure (1 bar) is called its standard molar enthalpy of vapourisation `(triangle_("vap") H^0):`
`Eg : H_(2) O_(l) to H_(2)O_(g) " "triangle_("vap") H^0=+40.79"KJ mol"^(-1)`