大学化学 >> 2015, Vol. 30 >> Issue (5): 52-54.doi: 10.3866/pku.DXHX20150552

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ΔG判据与ΔrGm判据的区别

孙文东   

  1. 东北师范大学化学学院 吉林长春 130024
  • 发布日期:2015-10-24
  • 通讯作者: 孙文东 E-mail:sunwd843@nenu.edu.cn

The Difference between ΔG and ΔrGm Criteria

Sun Wendong   

  1. Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, China
  • Published:2015-10-24

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摘要：

简要说明ΔG与ΔrGm作为方向性判据的区别。其中ΔG判据的适用条件是封闭系统的等温等压过程;而ΔrGm判据是ΔG判据应用于化学反应系统时的进一步推演。ΔrGm代表反应系统在某一时刻的势函数, 作为方向性判据, 只需要W'=0, 而不需要等温等压条件。

关键词: &Delta, G判据, &Delta, rGm判据, 吉布斯函数

Abstract:

The difference between ΔG and ΔrGm as direction criteria was briefly described. The ΔG criterion is applicable to the isothermal and isobaric processes of the closed system; however, the ΔrGm criterion is the further deduction of application of the ΔG criterion in chemical reaction system and represents the potential function of the reaction system at a certain time. ΔrGm as the direction criteria requires only W'= 0 instead of the isothermal and isobaric conditions.

Key words: ΔG criterion, ΔrGm criterion, The Gibbs function