DeltaH` (vap) for water is `40.7 kJ mol^( 1)`. The entropy of vapourisation of water is Predicting the Enthalpy of Vaporization and Calculating the Entropy of Vaporization of 87 Octane Gasoline Using Vapor Pressure Latent Heat of Vaporization Delta Hvap of Water calculated by corresponding states correlation in a one cell excel formula Chem Eng Musings 7. The enthalpy of vaporization of water at 100.0 C is Determine the standard enthalpy of formation of water at 650