Determination of the domain of the function F(HE,GE)=0 for Wilson, NRTL, LEMF and UNIQUAC equations

M.R. GENNERO DE CHIALVO; A.C. CHIALVO

INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH

AMER CHEMICAL SOC

Lugar: Washington; Año: 1994 vol. 33 p. 1035 - 1039

0888-5885

The domain boundary for the simultaneous correlation of the excess molar Gibbs free energy (GE) and the excess molar enthalpy (HE) of a binary system has been theoretically determined for the Wilson, NRTL, LEMF, and UNIQUAC equations. On this basis, the conditions in which such equations can describe systems with positive and/or negative values of the excess molar entropy (SE) have been evaluated. The results obtained demonstrate that the knowledge of the domain of the function F(HE,GE) = 0 avoids the inappropriate use of a given correlation equation beyond the corresponding limits.