H_2O–NH_4Cl SYSTEM: THERMODYNAMICS AND STRUCTURE OF SUPERSATURATED (8÷28m) SOLUTIONS AT 298.15 K

V. P. Korolev

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H_2O–NH_4Cl SYSTEM: THERMODYNAMICS AND STRUCTURE OF SUPERSATURATED (8÷28m) SOLUTIONS AT 298.15 K

机译：H_2O–NH_4Cl系统：298.15 K时超饱和（8÷28m）溶液的热力学和结构

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Thermodynamic characteristics are determined for supersaturated (8÷28m) aqueous ammonium chloride solutions at 298.15 K: activity as well as partial molar enthalpy, volume, and excess entropy of water, osmotic coefficients, density, and salt hydration numbers. The relative humidity above the solution decreases from 75.6% (8m solution) to 44.7% (28m solution). A directly proportional dependence is found between the enthalpy and entropy characteristics. The negative values of the nonideal portion of the Gibbs energy are due to structural effects (excess entropy). The excess entropy of water has the same value 1.8 J/(mol?K) in supersaturated 12m NaCl and 28m NH_4Cl. The ratio 12/28 = 3/7 is also valid for other “isoentropic” molalities of the said salts.

机译：确定了过饱和（8÷28m）氯化铵水溶液在298.15 K时的热力学特性：活性以及部分摩尔焓，水的体积和过量熵，渗透系数，密度和盐水化数。溶液上方的相对湿度从75.6％（8m溶液）降低到44.7％（28m溶液）。在焓和熵特征之间发现直接成比例的依赖性。吉布斯能量的非理想部分的负值是由于结构效应（熵过大）引起的。在过饱和的12m NaCl和28m NH_4Cl中，水的过量熵具有相同的1.8 J /（mol·K）值。对于所述盐的其他“等熵”摩尔浓度，比率12/28 ＝ 3/7也是有效的。

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《Journal of structural chemistry》 |2014年第4期|共6页
作者
V. P. Korolev;
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正文语种 eng
中图分类结构化学;
关键词
thermodynamics; aqueous solution; ammonium chloride.;

机译：热力学;水溶液;氯化铵;

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1. H_2O–NH_4Cl SYSTEM: THERMODYNAMICS AND STRUCTURE OF SUPERSATURATED (8÷28m) SOLUTIONS AT 298.15 K [J] . V. P. Korolev Journal of structural chemistry . 2014,第4期

机译：H_2O–NH_4Cl系统：298.15 K时超饱和（8÷28m）溶液的热力学和结构
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H_2O–NH_4Cl SYSTEM: THERMODYNAMICS AND STRUCTURE OF SUPERSATURATED (8÷28m) SOLUTIONS AT 298.15 K

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