Hvap for water is 40.7 KJ `mol^(1)` . The entropy of vaporization of water is: Solved Heat of vaporization of water at 100 degree C and Chegg.com For the vaporisation of water : `H_(2)O (I) hArr H_(2)O(g)` [1 atm. Pressure] Given : `Delta S = 120 JK^( 1)` and `Delta H =+45.0 kJ`. Evaluate the temperature at which liquid water Excess Enthalpy and Heat Capacity for an Ethanol Water Mixture Wolfram Demonstrations Project