The heats of vaporization of noble gases vary in the order

Enthalpy of vaporization ∝ Van der Waals forces ∝ Molar massThus, as molar mass increases, the enthalpy of vaporization increases.Thus correct order of enthalpy of vaporization of noble gases. âˆ´The heats of vaporization of noble gases vary in the order He < Ne < Ar < Kr < Xe < Rn