Standard enthalpy of vapourisation `Delta_("vap")H^( )` for water at `100^@C` is `40.66 kJ mol^( 1)`. The internal energy of vapourisation of water at `100^@C` (in kJ `mol^( 1)`) is (Assume water vapour to behave like Kit CBD, cigarette lectronique pour e liquide CBD Le Petit Vapoteur Standard enthalpy of vapourisation \Delta _ { \mathrm { vap } } \mathrm {.. Latent Heat of Vaporization Delta Hvap of Water calculated by corresponding states correlation in a one cell excel formula Chem Eng Musings