Teaching and Learning Dialectical Relationship between Thermodynamic Equilibrium and Reaction Rate Constant

Main Article Content

Tao Jin https://orcid.org/0000-0002-9707-3075
Fan-Mei Kong
Bao-Yin Yan
Gui-Zhai Zhang
Qing Liu
Qiu-Yue He
Xiao-Yan Zhou

Keywords

Thermodynamic equilibrium constant · Reaction rate constant · PBL teaching · Dialectical relation · Innovative thinking

Abstract

The development of science and technology in the present era has an urgent demand for the training of innovative thinking of undergraduates. This requirement actively promotes research and teaching of basic theories, beneficial to the career development of students. This study clarified the dialectical relation between thermodynamic equilibrium constant and reaction rate constant through the contrast thinking method. Findings reveal that both isobaric Van't Hoff equation and Arrhenius equation had four similar forms, and the change in the trend of both constants showed a similar law. By the derivation of the formation rate constant of product (KY) and the consumption rate constant of the reactant (KA), the ratio of both constants at the end state indicated the nature of equilibrium state in agreement with that of thermodynamic equilibrium constant (). This study has thus presented that the thermodynamic equilibrium constant contained the characteristics of microscopic dynamics based on the analysis of the reaction mechanism, and both constants are organically connected and unified. The reaction enthalpy and activation energy are closely related to each other with the same connotation.

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Abstract 27