高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (9): 1353.

• 论文 • 上一篇    下一篇

对二甲苯+环己烷及对二甲苯+二甲基亚砜的固液相平衡和过量吉布斯自由能

车冠全, 黄钟奇, 罗三来, 云逢存, 邹永匡   

  1. 中山大学化学系, 广州, 510275
  • 收稿日期:1993-09-09 修回日期:1994-05-21 出版日期:1994-09-24 发布日期:1994-09-24
  • 通讯作者: 车冠全,男,55岁,副教授.
  • 作者简介:车冠全,男,55岁,副教授.
  • 基金资助:

    国家自然科学基金

Solid-Liquid Phase Equilibria and Excess Gibbs Free Energies for p-Xylene+Cyclohexane,p-Xylene+Dimethyl Sulfoxide

CHE Guan-Quan, HUANG Zhong-Qi, LUO San-Lai, YUN Feng-Cun, ZOU Yong-Kuang   

  1. Department of Chemistry, Zhongshan University, Guangzhou, 510275
  • Received:1993-09-09 Revised:1994-05-21 Online:1994-09-24 Published:1994-09-24

PDF (PC)

被引次数

7

摘要： 测定了对二甲苯+环己烷及对二甲苯+二甲基亚砜体系(均为简单低共熔混合物)的固液平衡相图,计算出它们在313.15K的过量吉布斯自由能。结果表明两体系对理想溶液均产生正偏差。

关键词: 相图, 固液平衡, 过量吉布斯自由能

Abstract: Melting temperatures have been measured and the solid-liquid phase diagrams were constructed for p-xylene+cyclohexane, and p-xylene+ dimethyl sulfoxide.They are simple eutectic systems.Eutectic temperatures and compositions are 240. 96 K, 0.825 and 280.99K, 0.53Ofor(1-x)p-C6H4(CH3)2+xC6H12 and(1-x)p-C6H4 (CH3) 2+x(CH3)2SO, respectively. Excess molar Gibbs free energies were calculated at 313.15 K.The largest values of are 233.7 and 1224. 8/mol for(1-x)p-C6H4 (CH3) 2+xC6H12 and (1-x)pC6H4(CH3)2+x (CH3)2SO, respectively, showing positive deviations from ideal-solution behvior.The latter deviation is very large, especially.

Key words: Phase diagram, Solid-liquid equilibria, Excess Gibbs free energy

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