In this work we analyze the temperature dependence of the speed of sound, density, and refractive index of binary mixtures of acetone, methanol, and linear aliphatic alkanes (hexane, heptane, or octane) at atmospheric pressure. From the experimental measurements of these physical properties, the corresponding excess molar volumes, isentropic compressibility deviations, and refractive index deviations were derived. A set of variable-degree polynomials have been fitted to the results. Despite the large excess molar volumes obtained, they were satisfactorily correlated by a cubic equation of state with simple combinatorial mixing rules.