Precisely what does the following equation, in which R is the gas constant, allow one to calculate? ln xs = -dHf/R(T0-T/TT0) I have no idea what this could be. I know what each part of the equation is (gas constant, change in enthalpy of formation, Freezing point depression etc.) I just don't know what it allows me to calculate...except that its the natural log of something. I think it has something to do with entropy, but I'm not sure. Any help would be much appreciated.