Vapour pressures and excess Gibbs free energies of cyclohexane + n-hexane, + n-heptane and + n-octane at 298. 15₀ K

Abstract

By means of a continuous dilution vapour pressure apparatus the excess Gibbs free energies of binary liquid mixtures of cyclohexane with n- hexane, n-heptane and n-octane at 298.15₀ K have been determined. The values of this excess function were positive at all concentrations and decreased with an increase in the chain length of the n-alkane. The maximum values, 75.9, 49.7 and 24.6 J mol^-1, for the respective systems occurred in mixtures with a mole fraction of cyclohexane greater than 0.5.