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Density, speed of sound and refractive index of (n-hexane + cyclohexane + 1-hexanol) atT= 298.15 K

“…It was reported (23) that as the strength of the different interactions among the components of the studied mixture increased, excess isentropic compressibilities became more negative, due to a closer approach of unlike molecules, leading to a reduction in volume and compressibility. (9), (10), and (11), and standard deviations s of the fits •, {n-hexane(1) + cyclohexane(2)}, Mascato et al; (2) , {n-hexane(1) + 1-hexanol(2)}; , {cyclohexane(1) + 1-hexanol(2)}; --, equation (6). For the binaries containing 1-hexanol, the excess molar volume and excess isentropic compressibility curves show a similar behaviour, while refractive index deviations shows an opposite trend.…”

“…As mentioned in the introduction, the experimental results were used to test the prediction capability of various empirical equations compiled by Piñeiro et al (6) These equations are symmetric when an assumption of equal contribution by the three binaries is made and asymmetric in the presence of an associative, or polar compound. The tested symmetric equations are those of Kohler, Jacob-Fitzner, Colinet and Knobeloch-Schwartz, and the asymmetric ones are those of Tsao-Smith, Toop, Scatchard, Mathieson-Thynne and Hillert.…”

“…Empirical equations and group contribution methods are useful for predicting thermophysical properties from either pure components or measured binary data. The experimental data were used to test the prediction capability of several empirical equations compiled by Piñeiro et al (6) In order to predict excess molar volumes, the group contribution model of Nitta et al (7) was applied and its results were compared with the experimental values.…”

Thermodynamic properties of mixing for (1-alkanol + an-alkane+ a cyclic alkane) atT= 298.15 K. I. (n-Hexane + cyclohexane + 1-butanol)

“…The following expressions (Piñeiro et al (20) ) were also used to correlate the ternary properties studied:…”

Experimental and theoretically estimated excess molar enthalpies for (ethyl propionate+n -hexane + 1-pentanol) atT= 298.15 K

“…Ternary magnitude contributions were also used in two equations proposed in an earlier study. (9) Experimental values were compared with the estimates obtained by applying the group contribution models of Nitta et al (10) and UNIFAC, the latter in the versions introduced by Dang and Tassios, (11) Larsen, (12) and Weidlich and Gmehling. (13) Deviations of the ternary enthalpies calculated on the basis of several empirical methods were also listed.…”