Variation of latent heat of vaporization with temperature Download Scientific Diagram 5) For vaporization of water at 1 bar, \Delta H = 40.63 \mathrm {kJ} \ma.. Heats of Vaporization and Condensation Examples, Calculations and Definitions CK 12 Foundation Phase Transitions (10.3) Chemistry 110 Standard enthalpy of vaporization (vapH) for water at 100C is 40.66 kJ.. 3 Ways to Calculate Vapor Pressure wikiHow