Thermodynamic properties of aqueous mixed electrolyte {yNH4NO3+(1-y)NaNO3}(aq) at T=298.15 K

被引：7
|
作者：
El Guendouzi, M [1 ]
Marouani, M [1 ]
机构：
[1] Univ Hassan II Mohammedia, Fac Sci Ben Sik, Dept Chim, Chim Phys Lab, Casablanca, Morocco
来源：
JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2005年 / 50卷 / 02期
关键词：
D O I：
10.1021/je049884i
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The mixed aqueous electrolyte system with ammonium and sodium nitrate {NH4NO3 + (1 - y)NaNO3}-(aq) has been studied by the hygrometric method at a temperature of 298.15 K. The water activity of this system has been measured at total molalities from 0.4 mol center dot kg(-1) to about saturation for different ionic-strength fractions, y, of NH4NO3 of 0.20, 0.50, and 0.80. The experimental results are compared with the Zdanovskii-Stokes-Robinson (ZSR), Lietzke and Stoughton (LSII), Kusik and Meissner (KM), and Pitzer models. From these measurements, the Pitzer mixing ionic parameters were determined and used to calculate the solute activity coefficients in the mixture. The obtained results were used to calculate the excess Gibbs energy.
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页码：334 / 339
页数：6
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