EXCESS-ENTHALPIES AND EXCESS HEAT-CAPACITIES OF THE TERNARY-SYSTEM ETHANOL PLUS N,N-DIMETHYLFORMAMIDE PLUS TETRAHYDROFURAN AT 298.15 K

被引：12

作者：

CONTI, G ^{[1
]}

GIANNI, P ^{[1
]}

LEPORI, L ^{[1
]}

MATTEOLI, E ^{[1
]}

机构：

[1] CNR,IST CHIM QUANTIST & ENERGET MOLEC,I-56126 PISA,ITALY

来源：

FLUID PHASE EQUILIBRIA | 1995年 / 108卷 / 1-2期

关键词：

EXPERIMENTS; DATA; EXCESS ENTHALPIES; EXCESS HEAT CAPACITIES; MIXTURES; POLAR;

D O I：

10.1016/0378-3812(95)02681-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Excess enthalpies and excess heat capacities at 298.15 K for the ternary system ethanol+dimethylformamide+ tetrahydrofuran were determined by means of a flow calorimetric apparatus built in our laboratory. Experimental data were described with a Redlich-Kister type equation and compared with those of other ternary systems previously studied (ethanol+tetrahydrofuran+cyclohexane, ethanol+dimethylformamide+cyclohexane, dimethylformamide+tetrahydrofuran+cyclohexane). A peculiar behaviour was observed for mixtures containing dimethylformamide, namely the negative Values of both H-E and C-p(E) ternary contributions. A satisfactory prediction of experimental H-E data is provided by the UNIQUAC model, while UNIFAC (Dortmund, Germany) clearly fails probably owing to an unsufficient definition of interaction parameters involving dimethylformamide.

引用

页码：255 / 268

页数：14

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