Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (04): 439-442.doi: 10.3866/PKU.WHXB20050419

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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

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