EXCESS MOLAR VOLUMES AND ISOTHERMAL VAPOR-LIQUID-EQUILIBRIUM IN THE BINARY-SYSTEM 1,1,1-TRICHLOROETHANE WITH 1-CHLOROBUTANE AND WITH PYRIDINE AT 25-DEGREES-C

Densities and vapor-liquid equilibrium were determined for 1-chlorobut ane and pyridine with 1,1,1-trichloroethane at 25 degrees C. From the experimental results, excess molal volumes and excess molar Gibbs ener gies were calculated. Information could be obtained about the possible interactions between the components of both binary systems. The Prigo gine-Flory-Patterson theory was applied to calculate excess molar volu mes. Liquid activity coefficients were calculated and correlated with different expressions existing in the literature.