The density rho, speed of sound u, and viscosity eta of eight binary mixtures of ethanenitrile and propanenitrile with methyl acetate, ethyl acetate, and butyl acetate and of adiponitrile with ethyl acetate and butyl acetate have been measured at 303.15 K. The isentropic compressibility K-S, excess volume V-E, and excess isentropic compressibility K-S(E) have been calculated therefrom. The values of V-E and K-S(E) are explainabIe by considering the varying extent of interactions and the difference in free volumes between unlike components.