Free energy and enthalpy of mixing

To verify the thermodjuamic consistency between the Gibbs function of mixing and the enthalpj of mixing of carbon tetrachloride + cyclohexane. 

The excess Gibbs function of mixing G for carbon tetrachloride -j-cydohexane has been determined at several temperatures by Scatchard, Wood, and Mochel (J. Amer. Chem. Soc. 1939, 61, 3206). Their results can be represented by the relation (compare problem 69) 

We may reasonably call w an interchange free energy , u an interchange total energy , and s an interchange entropy . This terminology may be helpful for memorizing the relations between w, u, and s. Whether it is used or not, we have the thermodynamic relation 

We notice that the experimental values of u are nearly linear in the temperature so that interpolation is easy. We construct table 3 for the experimental values of w, u, Ts, and s. 

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