Excess enthalphies

Figure 2. (a) Excess enthalphies of n-butoxyethanol/water at 55.0 °C from four replicate titrations, starting at neat water (b) continuations of the titrations of (a). 

Figure 3. Excess enthalphies of aqueous solutions of n-butanol/water at 30.0 °C, compared to results from the literature squares, present results triangles, ref. 13 circles, ref.14 diamonds, interpolated from ref. 16.

The activity coefficients of the components of a regular solution assume a simple form which results from the general expression of excess enthalphy and the characteristic relationships of these solutions as follows ... 

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