大学化学 >> 2015, Vol. 30 >> Issue (3): 66-70.doi: 10.3866/pku.DXHX2010366

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不同标态下标准电极电势间关系的热力学解释

章应辉   

  1. 南开大学化学系 天津 300071
  • 发布日期:2015-06-25
  • 基金资助:

    国家基础科学人才培养基金(No.J1103306);南开大学2012年教育教学改革项目

The Thermodynamic Explanation of the Relationship between the Standard Electrode Potentials in Different Standard States

Zhang Yinghui   

  1. Chemistry Department, Nankai University, Tianjin 300071, China
  • Published:2015-06-25

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摘要：

利用标准吉布斯自由能变化ΔrGmθ与标准电极电势和标准反应平衡常数间的联系,分析不同标态下电极标准电极电势间的关系。根据这一思想,以水解离平衡为例,讨论了设计原电池求化学反应平衡常数的一般方法。

关键词: 标准吉布斯自由能变化, 标准电极电势, 化学平衡常数

Abstract:

Based on the relationship between the standard Gibbs free energy change, the standard electrode potential and the standard reaction equilibrium constant, the relationship between standard electrode potentials in different standard states has been analyzed. Accordingly, the general method to calculate the reaction equilibrium constant by designing a Galvanic battery is discussed, taking the dissociation equilibrium of water as an example.

Key words: Standard Gibbs free energy change, Standard electrode potential, Reaction equilibrium constant