Delta H^0 vap of water is +40.79 kJ mol at 1 bar and 100 deg C. Change in internal energy for this__ Water Enthalpy and Entropy vs. Temperature Heat of Vaporization Example Problem Video answer for \Delta_{\text {vap }} \mathrm{H}^{\Theta} for water is +40.79 \mathrm{kJ} \mathrm{mol}^{ 1} at 1 bar and 100^{\circ} \mathrm{C}. Change in internal energy for this vapourisation under Simple, Quick, and Accurate Determination of the Heat of Vaporization of Water Chemical Education Xchange ALEKS Calculating Enthalpy of Vaporization from Vapor Pressure YouTube