EXCESS-ENTHALPIES OF NONAN-1-OL AND UNDECAN-1-OL WITH OCTANE AT HIGH DILUTIONS AND AT 298.15-K

Heats of mixing at high dilutions were determined for binary systems consisting of nonan-1-ol or undecan-1-ol and n-octane at 298.15 K. Partial molar heats of mixing at infinite dilution, giving approximate values of hydrogen bonding energies in alcohols, were determined by extrapolation of the experimental data to zero concentrations of the alcohols (x1 = 0). The results are correlated by means of polynomials, the UNIQUAC and the UNIQUAC associated-solution models. The ability of these equations to represent the thermodynamic functions of dilute mixtures of alkan-1-ols in n-alkanes at 298.15 K is discussed. © 1990.