Reply To: Reference Enthalpy Values in Material Properties database Ansys Fluent

[jcooper]

 

The difference in the enthalpies of formation is used to calculate the latent heat of evaporation/condensation.  (One way to understand this is to consider steam burns at STP:  These are so terrible because the steam condenses on the skin as it makes contact, releasing additional heat in the process. This heat release will be the heat of phase change from vapour to liquid -2.418e+08 J/kgmol – (-2.858e+08 J/kgmol) = +0.44e+08 J/mol of steam condensed)