大学化学 >> 2015, Vol. 30 >> Issue (4): 74-77.doi: 10.3866/pku.DXHX20150474

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气体节流膨胀过程的热力学分析

胡新根, 林娟娟   

  1. 温州大学化学与材料工程学院 浙江温州 325035
  • 发布日期:2015-08-14
  • 通讯作者: 胡新根 E-mail:hxgwzu@126.com
  • 基金资助:

    浙江省精品课程建设项目

Thermodynamic Analysis on Throttling Expansion of Gases

Hu Xingen, Lin Juanjuan   

  1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, China
  • Published:2015-08-14

摘要:

探讨气体节流膨胀过程中的熵(S)的变化,指出任何气体的节流膨胀都是熵增过程,并且是不可逆的。在此基础上,讨论和总结了节流膨胀过程的全部热力学特征。

关键词: 气体, 节流膨胀, 焦耳-汤姆逊效应, 熵, 热力学特征

Abstract:

In this paper, the change of entropy function (S) in the process of gas throttling expansion has been explored. It has been pointed out that the entropy change associated with the throttling expansions of any gases is always positive, and that the process is irreversible. The total thermodynamic characteristics of throttling expansions have been systematically discussed and summarized. The content involved is of importance in the teaching practice for students to gain better insights into the characteristics of the irreversible process, the function of entropy and the principle of entropy increase, as well as the relationships among all thermodynamic functions.

Key words: Gas, Throttling expansion, Joule-Thomson coefficient, Entropy, Thermodynamic characteristics

MSC2000: 

  • O6