The enthalpy of vaporization of \mathrm{H}{2} \mathrm{O}(1) is x \mathrm{~kJ} \mathrm{mol} and enthalpy of formation of water vapour \mathrm{ykJ} \mathrm{mol}. Enthalpy of formation of Calculate the enthalpy change for the process CCl4(g) gives C(g) plus 4 Cl(g) and calculate bond enthalpy of C Cl in CCl4(g). Enthalpy of vaporization Wikipedia Hybrid Delta 8 Pen What is `Delta U` when `2.0` mole of liquid water vaporises at `100^(@)C`? The heat of vaporisation `(Delta H_("vap".))` of water at `100^(@)C` is `40.66 KJmol^( 1)`. phase changes.svg