高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (4): 531.

• 研究论文 • 上一篇    下一篇

热动力学对比进度法(Ⅲ)——2-Ⅰ型可逆反应的热动力学研究

刘劲松, 曾宪诚, 邓郁   

  1. 四川大学化学系, 成都 610064
  • 收稿日期:1992-03-12 修回日期:1993-02-10 出版日期:1993-04-24 发布日期:1993-04-24
  • 通讯作者: 刘劲松
  • 基金资助:

    国家自然科学基金

Reduced Extent Method in Studies of Thermokinetics (Ⅲ)——Studies on Thermokinetics of the 2-Ⅰ Reversible Reaction

LIU Jing-Song, ZENG Xian-Cheng, DENG Yu   

  1. Departmeat of Chemistry, Sichuan University, Chengdu, 610064
  • Received:1992-03-12 Revised:1993-02-10 Online:1993-04-24 Published:1993-04-24

摘要: 本文建立了2-Ⅰ型可逆反应的热动力学对比进度方程和热动力学模型。用热导式自动热量计研究了一个2-Ⅰ型吸热反应体系,并对结果进行了讨论。

关键词: 可逆反应, 吸热反应, 热动力学, 对比进度法, 量热法

Abstract: On the basis of previous articles, the reduced extent equation and the model of thermokinet-ics for 2-1 reversible reaction, with which both rate constants and equilibrium constant can be calculated simultaneously, are suggested in this paper.The thermokinetics for an endothermic 2-1 reversible reaction system, the acid-catalyzed esterification between acetic acid and methanol in buffer solution (pH=1.5), has been studied with a conduction calorimeter at 30.0 and 40.0℃.The rate constants of forward and backward reactions and equilibrium constants were calculated with the model in this paper, and then, activation parameters of this reversible reaction were obtained.These experimental results, by which the validation of this model has been tested, are discussed in detail.

Key words: Reversible reaction, Endothermic reaction, Thermokinetics, Reduced extent method, Calorimetry

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