Predicting the Enthalpy of Vaporization and Calculating the Entropy of Vaporization of 87 Octane Gasoline Using Vapor Pressure The enthalpy of vapourisation of liquid water using the data : `H_(2)(g)+1 2O_(2)(g)rarr H_(2)O(l) Latent Heat of Vaporization Delta Hvap of Water calculated by corresponding states correlation in a one cell excel formula Chem Eng Musings Solved: For the reversible vaporization of water at $$100^0C$$ and 1 atmospheric pressure, $$Delta [Physics] Calculate the `K_b` for water given latent heat of vaporisation of water `540 Cal gm`.