Hi...I would very much appreciate thermo help. I am using software that requires enthalpy data to be in units of J/m^3 (i.e., enthalpy per unit volume). The software also requires that enthalpy always increases with increasing temperature. My problem is that my enthalpy data in J/m3 do not always increase with increasing temperature. The data are output from calculations of multiphase, multicomponent cooling/crystallization. Specifically, the system (liquid + solids produced) AND the liquid AND the solids enthalpies vary as T decreases. I am embarrassed to ask, but should 1) system and 2) liquid or solids enthalpies in units of J/unit volume stay constant, or only decrease, or decrease and increase during multiphase, multicomponent cooling/crystallization? What about in a one-component system? Would this be different? My system, solids, and liquid enthalpy data do increase AND decrease as T decreases (i.e., during crystallization). I need to know whether they should. Then I can figure out how to deal with getting my enthalpy data into the software that requires enthalpy only decrease with decreasing T. Thank you very, very much for any help!