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Studies on Deduction of Clapeyron′s Equation(PDF)

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
1999年05期
Page:
474-476
Research Field:
Publishing date:

Info

Title:
Studies on Deduction of Clapeyron′s Equation
Author(s):
ZhangChangshan YuBoheng YeJingxian
School of Chemical Engineering, NUST, Nanjing 210094
Keywords:
thermodynamics phase equilibrium Clapeyron’s equation
PACS:
O642.42
DOI:
-
Abstract:
Clapey ron’s equat ion is deduced strict ly by considering the gas-liquid phase in a system of one component. When heated, the g as and liquid w ill move to a new state w ith a higher temperature and a g reater pressure. Such a change is equivalent to that of being heated at constant pressure and afterw ards being compressed at constant temperature as a pure phase for the gas and to that of being compressed at constant temperature and afterw ards being heated at constant pressure as a sing le phase for the liquid. In this w ay, the variat ions of Gibbs f ree energy of tw o phases in equilibrium can be obtained conveniently and correctly f rom the basic thermodynamic formulas used for the systems of one component and only one phase, and the problem of using incorrect independent v ariables during the normal deduct ion of Clapeyron’s equat ion is avoided.

References:

1 郭余年, 赵凤云. 对公认的Clapeyron 方程的推导的不同意见. 化学通报, 1995( 11) : 50~ 51
2 傅献彩, 沈文霞, 姚天扬. 物理化学: 上册. 第4 版. 北京: 高等教育出版社, 1993. 144~ 145
3 胡英, 吕瑞东, 刘国杰, 陆曜南. 物理化学: 上册. 第3 版. 北京: 高等教育出版社, 1993. 158~ 159

Memo

Memo:
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Last Update: 2013-03-29