Abstract: By employing the equation relating the viscosity of a binary mixture to its excess Gibbs free energy as proposed in part ( I ) of this series of papers, and by correlating viscosity data with McAillisters multi-bodg interaction model, calculation of vapor-liquid equilibrium data has been made for 9 binary systems, among which 3 are alcoholic organic ones and 1 is alcoholic aqueous. Calculated values are compared with corresponding experimental data. Except for one system showing relatively high deviation, the root mean square deviations of the bubble points and the vapor phase compositions of all systems are 0.09-0.80℃ and 0.003-0.038respectively.