Solved calculate the experimental deltaHvap. delta H vap R= Chegg.com Chapter 10: Energy Problems (ME fusion vaporization) and Q=mc delta t Science, Chemistry ShowMe Delta_{vap}H^ for water is +40.49 kJ moi^ 1 at 1 bar and 100C . Change in internal energy for this vaporization under same condition is Sarthaks eConnect Largest Online Education Community Solved Hvap = heat of vaporization = constant R= gas Chegg.com Latent Heat of Vaporization Delta Hvap of Water calculated by corresponding states correlation in a one cell excel formula Chem Eng Musings 5) For vaporization of water at 1 bar, \Delta H = 40.63 \mathrm {kJ} \ma..