Delta Vap H Latent Heat of Vaporization Delta Hvap of Water calculated by corresponding states correlation in a one cell excel formula The enthalpies of vaporization at 25C ( H vap at 25C; kJ mol 1), Download Scientific Diagram a) Show that the value of \Delta H for the adiabatic expansion of a perf.. Water Enthalpy and Entropy vs. Temperature Solved: H v a p for water is 40.7 KJ mol 1 . The entropy of vapo [Chemistry] Change in enthalpy of substance x is 300 j gm at its boiling point 300k then molar entropy change for Brainly.in