Densities, viscosities, and refractive indices have been measured for the binary liquid mixtures of isoamyl acetate or methyl benzoate with (o-, m-, and p-) xylenes and ethylbenzene over the entire composition range at (303.15 and 313.15) K. From the experimental data, the values of viscosity deviations ∆η and deviation in molar refraction ∆R have been determined. The values of ∆η and ∆R have been fitted to the Redlich-Kister polynomial equation to determine the binary coefficients and the standard deviation. The predictive ability of several one-, two-, and three-parameter viscosity models was also tested. It was observed that the viscosities were best correlated with the McAllister equation.

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Densities, viscosities, and speeds of sound of binary mixtures of ethyl formate with benzene, isopropyl benzene, isobutyl benzene, and butylbenzene have been measured over the entire range of composition, at (303.15, 308.15, and 313.15) K and at atmospheric pressure. The excess volume, V E, deviation in viscosity, Δη, and deviation in isentropic compressibility, ΔK s, have been calculated from the experimental values of density, viscosity, and ultrasonic velocity. The excess volumes are positive, while the deviations in viscosities are negative for all of the studied binary systems over the whole composition range. The deviation in isentropic compressibility shows both positive and negative deviations for ethyl formate with benzene and isopropyl benzene, and for the remaining systems they are positive. The ability of some of the empirical models to calculate mixing viscosities was also tested.

The viscosity, density, and refractive index of binary mixtures of ethyl formate or ethyl benzoate with o-xylene, m-xylene, p-xylene, and ethylbenzene were determined at 303.15 K and 313.15 K and atmospheric pressure for the whole composition range. From the experimental measurements, the deviations in viscosity, Δη, were correlated accurately with the Redlich−Kister polynomial equation. The deviations in molar refraction, ΔR, were calculated from the Lorentz−Lorentz equation. The experimental viscosities were fitted to an empirical equation proposed by Frenkel. It was observed that the equation predicts the mixture viscosities reasonably well at both temperatures and the agreement between the experimental and calculated values is satisfactory.

Excess volumes, V E , of the binary liquid systems of methyl formate, ethyl formate, propyl formate, and benzyl acetate each with bromo-, chloro-, and nitrobenzenes have been derived from experimental density measurements at (303.15, 308.15, and 313.15) K and atmospheric pressure over the entire composition range. These excess volumes were fitted to the Redlich-Kister polynomial equation to derive the coefficients and standard errors. The excess volumes for all of the systems were found to be negative across the mole compositions.