Water Enthalpy and Entropy vs. Temperature Excess Enthalpy and Heat Capacity for an Ethanol Water Mixture Wolfram Demonstrations Project Solved: For the reversible vaporization of water at $$100^0C$$ and 1 atmospheric pressure, $$Delta [Physics] 5) For vaporization of water at 1 bar, \Delta H = 40.63 \mathrm {kJ} \ma.. Entropy of Vaporization an overview ScienceDirect Topics 3 Ways to Calculate Vapor Pressure wikiHow