关于溶液相对于具有总活度系数的假设理想溶液的偏差的研究。
Studies on the Deviation of a Solution from the Hypothetical Ideal Solution with the Total Activity Coefficient.
作者信息
Zhou Yeqiu, Chen Feiwu, Zhou Yu
机构信息
Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
出版信息
Molecules. 2025 Apr 9;30(8):1681. doi: 10.3390/molecules30081681.
The total activity coefficient is exploited to study the deviation of a solution from the hypothetical ideal solution. It is proven for a solution that the curve of the total activity coefficient and all curves of activity coefficients of components will intersect at the stationary point of the total activity coefficient curve. It is found for the negative (positive) deviation binary solutions studied here that the magnitudes of the total activity coefficient at the minimum (maximum) point of the total activity coefficient curve becomes bigger as the intermolecular attraction of the solute and solvent become weaker. Furthermore, the shape of the total activity coefficient curve, as well as the molar concentration of its stationary point, are dependent on the intermolecular attraction of components in the solution. Finally, for the negative solution of tetrahydrofuran + 1,1,2,2-tetrachloroethane and the positive-deviation solution of ethyl isobutyrate + 1-butanol, the effects of pressure on the total activity coefficient of the negative and positive solutions are investigated.
利用总活度系数研究溶液与假设理想溶液的偏差。对于一种溶液，已证明总活度系数曲线与各组分活度系数曲线在总活度系数曲线的驻点处相交。在此研究的负（正）偏差二元溶液中发现，随着溶质和溶剂分子间吸引力变弱，总活度系数曲线最低点（最高点）处的总活度系数值变得更大。此外，总活度系数曲线的形状及其驻点的摩尔浓度取决于溶液中各组分的分子间吸引力。最后，针对四氢呋喃 + 1,1,2,2 - 四氯乙烷的负偏差溶液和异丁酸乙酯 + 1 - 丁醇的正偏差溶液，研究了压力对正负偏差溶液总活度系数的影响。
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