5.4: Vapor Pressure Chemistry LibreTexts Thermodynamics Dornshuld Water Boundless Biology Study Guides 5) For vaporization of water at 1 bar, \Delta H = 40.63 \mathrm {kJ} \ma.. 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
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