Densities, Viscosities, and Refractive Indices of Binary Mixtures of Anisole with Benzene, Methylbenzene, Ethylbenzene, Propylbenzene, and Butylbenzene at (293.15 and 303.15) K

Abstract

Density (F), viscosity (η), and refractive index (n D ) data of the binary mixtures of anisole + benzene, + methylbenzene, + ethylbenzene, + propylbenzene, and + butylbenzene were measured over the whole composition range at (293.15 and 303.15) K and atmospheric pressure. The viscosity data were correlated by empirical and semiempirical equations. The refractive index data were compared with calculated values using different models based on mixing rules. The excess molar volumes (V E ) and viscosity deviations (∆η) were derived from the measurements. The V E and ∆η of binary mixtures were fitted to Redlich-Kister polynomial equation. The excess and deviation functions are negative and decrease with increasing side chain length of the parent benzene molecule in the following order: benzene > methylbenzene > ethylbenzene > propylbenzene > butylbenzene.

Volumetric and ultrasonic behaviour of binary mixtures of 1-nonanol with o-cresol, m-cresol, p-cresol and anisole at T=(293.15 and 313.15)K

“…Before each series of measurements, the calibration of the apparatus was carried out at working temperature by measuring the density and speed of sound of double-distilled water, benzene, and toluene, respectively. The experimental values conform closely to their corresponding literature values [8][9][10][11][12][13][14][15][16][17] with an uncertainty of ±2 Á 10 À2 kg Á m À3 and ±1.00 m s À1 for the density and speed of sound, respectively.…”

“…The values of C P were obtained from the literature [14,16,17] and the thermal expansion coefficient, a, has been calculated according to equation (5) by using a quadratic function q(T) at the temperatures studied [1,2,14,16] a ¼ À…”

“…The deviation of the speed of sound, u D , from the speed of sound of an ideal mixture, is defined as [14,16] …”

“…The purity of these solvents was ascertained by comparing the measured densities and speeds of sound at T = (293. 15 and 313.15) K with the available literature [8][9][10][11][12][13][14][15][16][17] compiled in table 1.…”

“…To derive the values of partial molar volumes, equation (14) is differentiated with respect to x 1 , and substituting the results in equations (16) and (17) gives the following equations for the partial molar volumes of isomeric cresols and anisole, V1 and of 1-nonanol, V2 .…”