大学化学 >> 2026, Vol. 41 >> Issue (10): 448-453.doi: 10.12461/PKU.DXHX202511015

自学之友 上一篇    

普通化学G判据的图形教学法

李新学   

  1. 北京科技大学化学系, 北京 100083
  • 收稿日期:2025-11-03 录用日期:2025-12-02 发布日期:2026-10-13
  • 通讯作者: 李新学 E-mail:xinxueli@ustb.edu.cn Xinxue Li
  • 基金资助:
    北京科技大学本科教育教学改革重大项目(JG2023ZD05)；北京科技大学教材项目(JC2025YB033)

Exploration of graphical teaching methods for the Gibbs free energy criterion in general chemistry

Xinxue Li   

  1. Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2025-11-03 Accepted:2025-12-02 Published:2026-10-13
  • Contact: Xinxue Li E-mail:xinxueli@ustb.edu.cn

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摘要： 以N2O4的分解反应为例，提出了反应体系吉布斯自由能G的估算方法，绘制了G与反应进度ξ的关系图，阐明了化学反应方向判据摩尔反应吉布斯自由能变△rGm(T)的意义，有助于培养学生的数形结合能力，以及建立清晰的概念。

关键词: 吉布斯自由能, 数形结合, 普通化学

Abstract: Using the decomposition reaction of N2O4 as a case study, this paper proposes a method for estimating the Gibbs free energy (G) of the reaction system. The relationship between G and the extent of reaction progress (ξ) is graphically illustrated, clarifying the meaning of the molar reaction Gibbs free energy change △rGm(T) as a criterion for determining chemical reaction direction. This approach enhances students’ ability to integrate mathematical modeling with graphical analysis while reinforcing fundamental concepts.

Key words: Gibbs free energy, Integration of number and shape, General chemistry