Isobaric vapor-liquid equilibrium data have been measured for binary mixtures of acrylonitrile with hexane, cyclohexane, benzene, toluene, and 2-butanone. For each of these five binary mixtures and the acrylonitrile + acetonitrile system excess enthalpies have been determined at 50 degrees C. Azeotropic compositions have been measured for the systems acrylonitrile +hexane, +cyclohexane, +benzene, and +2-butanone. The experimental data were fitted to the NRTL model using linear temperature dependent interaction parameters.