EXCESS VOLUMES AND GIBBS FREE-ENERGIES OF MIXTURES CONTAINING ALKANENITRILES

被引：3

作者：

DERNINI, S ^{[1
]}

POLCARO, AM ^{[1
]}

MARONGIU, B ^{[1
]}

PORCEDDA, S ^{[1
]}

机构：

[1] UNIV CAGLIARI,DIPARTIMENTO SCI CHIM,I-09124 CAGLIARI,ITALY

来源：

FLUID PHASE EQUILIBRIA | 1993年 / 87卷 / 01期

关键词：

DATA; VLE LOW PRESSURE; EXCESS VOLUME; MIXTURES;

D O I：

10.1016/0378-3812(93)85024-G

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Excess volumes, V(E), by means of a vibrating-tube densimeter, and Vapor-Liquid equilibria, by head-space gas-chromatographic analysis of the equilibrated vapour phase directly withdrawn from equilibration apparatus, of binary mixtures containing n-alkanenitriles with n-alkanes or cyclohexane, were determined at 298.15 K. Measurements of the test mixtures, ethanol + cyclohexane were also made. Excess molar Gibbs free energies, G(E), for the examined mixtures were obtained by a least - squares treatment of the equilibrium x, y results. The V(E) and G(E) values are positive for all the systems. The steric effect exerted by the alkyl groups adjacent to the CN group results in a regular decrease of the G(E) with increasing the number of alkyl groups in the alkanenitrile.

引用

页码：163 / 175

页数：13

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