Density, Refractive Index, and Speed of Sound of Binary Mixtures (Diethyl Carbonate + Alcohols) at Several Temperatures

Density, ρ; refractive index on mixing, n D; and speed of sound, u; at 293.15 K, 298.15 K, 303.15 K, and 313.15 K and atmospheric pressure have been measured for binary mixtures of diethyl carbonate (DEC) + methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, or 1-pentanol. Excess molar volumes, V E; changes of refractive index on mixing, Δ n D; and deviations in isentropic compressibility, Δ κ S; for the above systems have been calculated. The Redlich−Kister equation has been used to estimate the binary fitting parameters, and root-mean-square deviations from the regression lines are shown. The V E values were fitted as a function of the mole fraction and temperature to a polynomial equation.