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In this work we present experimental values of the density, refractive index, and speed of sound of the binary mixtures methanol or ethanol plus hexane, heptane, and octane at the temperatures 303.15, 308.15, 313.15, and 318.15 K and at atmospheric pressure, as a function of mole fraction. The experimental results have been fitted as a funtion of composition. A comparison with other experimental data in the literature has been made.

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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.