物理化学学报 >> 2005, Vol. 21 >> Issue (04): 439-442.doi: 10.3866/PKU.WHXB20050419

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苯-水-乙醇三元溶液体系的临界行为

杨涛; 周从山; 朱欣   

  1. 湖南理工学院化学化工系,岳阳 414000
  • 收稿日期:2004-08-06 修回日期:2004-11-06 发布日期:2005-04-15
  • 通讯作者: 周从山 E-mail:zhoucongsh@sohu.com

The Critical Behavior of Benzene-Water-Ethanol Ternary Solutions

YANG Tao; ZHOU Cong-Shan; ZHU Xin   

  1. Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000
  • Received:2004-08-06 Revised:2004-11-06 Published:2005-04-15
  • Contact: ZHOU Cong-Shan E-mail:zhoucongsh@sohu.com

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摘要： 通过等体积滴定法测定了苯-水-乙醇三元部分互溶溶液体系的会溶点曲线；测定了29.00±0.05 ℃时,等溶点附近的等温共存曲线；拟合得到苯-水-乙醇体系序参量临界指数β= 0.38 ± 0.04,序参量临界指前因子K= 1.3 ± 0.2. 说明三元部分互溶溶液体系在等温会溶点附近有非经典临界溶液理论行为, 符合Fisher重正化模型.

关键词: 临界现象, 序参量, 临界指数, 等温会溶点, 3D-Ising模型, Fisher重正化模型

Abstract: The consolute curve of benzene-water-ethanol ternary solutions has been measured by using equal-volume titration, and the coexistence curve near isothermal consolute point at 29.00±0.05 ℃ has also been measured. The obtained order-parameter critical index β = 0.38±0.04, and the order-parameter amplitude K =1.3±0.2. It indicates that near the isothermal consolute point, the critical index of the partly soluble ternary solutions fits Fisher renormalization model well, and it has the character of non-classical critical solution theory.

Key words: Critical phenomena, Order-parameter, Critical index, Isothermal consolute point, 3D-Ising Model, Fisher renormalization model