Thermodynamic properties of NaCl-NH4Cl-LiCl-H2O at T=298.15 K Water activities, osmotic and activity coefficients

被引：7
作者：
Dinane, Abderrahim [1 ]
机构：
[1] Ecole Royale Navale, Dept Rech & Projets, Lab Thermodynam, Casablanca 20000, Morocco
来源：
FLUID PHASE EQUILIBRIA | 2008年 / 273卷 / 1-2期
关键词：
Aqueous mixed electrolytes; Sodium-ammonium-lithium chloride solutions; Relative humidity; Water activity; Osmotic coefficient; Activity coefficient; Pitzer's model; ECA rule; RS model; LSII model;
D O I：
10.1016/j.fluid.2008.08.009
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The thermodynamic properties of the quaternary aqueous system NaCl-NH4Cl-LiCl-H2O have been studied using the hygrometric method. The water activities of this aqueous electrolyte system were experimentally determined at T = 298.15 K at total ionic-strength from 0.4 to 6 mol kg(-1) for different ionic-strength fractions y of one of the three solutes ranging from 1/3 to 2/3 with the constant ratio r of molality of the two other solutes of one. The experiments were performed by measuring the diameter of droplets of the solutions as a function of the surrounding relative humidity. The data allow the deduction of osmotic coefficients. The results obtained were correlated by the Pitzer model, the Dinane-Pitzer model, the Robinson-Stokes (RS) equation, the Lietzke-Stoughton (LSII) model, and the Dinane mixing rules ECA I and ECA II. The solute activity coefficients of components in the mixture are also determined for different ionic-strength fractions y of solutes. (C) 2008 Elsevier B.V. All rights reserved.
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页码：59 / 67
页数：9
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