Densities and speeds of sound have been measured at T = 298.15 K and atmospheric pressure for acetone, 2-butanone, and 2-pentanone + dimethyl carbonate over the whole composition range. Excess molar volumes and deviations in isentropic compressibility were fit to the Redlich-Kister polynomial for the binary systems. Isobaric vapor-liquid equilibrium data for binary systems acetone + dimethyl carbonate, 2-butanone + dimethyl carbonate, and dimethyl carbonate + 2-pentanone have been experimentally determined at 101.3 kPa. The experimental data were correlated with the Wilson, NRTL, and UNIQUAC equations.