(Vapour plus liquid) equilibria of (water plus dimethylformamide): application of the headspace gas chromatography for the determination of thermodynamic interactions

被引：18

作者：

Barth, C ^{[1
]}

Horst, R ^{[1
]}

Wolf, BA ^{[1
]}

机构：

[1] Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 1998年 / 30卷 / 05期

关键词：

(vapour + liquid) equilibria; (water + dimethylformamide); headspace gas chromatography; Gibbs energy of mixing; Flory-Huggins interaction parameter;

D O I：

10.1006/jcht.1997.0333

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Isothermal measurements of the partial vapour pressures have been carried out on {water + dimethylformamide (DMF)} at temperatures between T = 305.15 K and T = 323.15 K using an apparatus composed of a headspace sampler and a normal gas chromatograph. These data were simultaneously evaluated in one step with respect to the (composition dependent, integral) Flory-Huggins interaction parameter g by means of a new method which minimizes the Gibbs energy of mixing and does not require chemical potentials. The expression for g given by Koningsveld and Kleintjens, originally designed for polymer solutions, describes the present results best. (C) 1998 Academic Press Limited.

引用

页码：641 / 652

页数：12

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