Analysis of the Excess Gibbs Energies of Binary Mixtures Using Non-randomness Factors Determined from Excess Volume Data

An analytical equation for the excess Gibbs energies of mixtures was derived on the basis of the non-random two-liquid model, which was applied to the derivation of an analytical equation for excess volumes proposed by the present author. The derived equation involves new adjustable parameters of intermolecular interaction. The validity of the equation was examined for 13 binary mixtures by using the non-randomness factors determined from the excess volume data, and it was shown that the calculated excess Gibbs energies were in good agreement with the observed values. The sequence of the values of the interaction parameters seems to be reasonable.