物理化学学报 >> 1997, Vol. 13 >> Issue (05): 425-431.doi: 10.3866/PKU.WHXB19970508

研究论文 上一篇    下一篇

热动力学的滴定量热发研究 I.一级反应的热动力学

汪存信,梁毅,王文清,宋昭华,刘欲文,屈松生   

  1. 武汉大学化学系,武汉 430072
  • 收稿日期:1996-10-28 修回日期:1997-01-13 发布日期:1997-05-15
  • 通讯作者: 梁毅

Titration Calorimetry Applied to the Study of Thermokinetics I.Thermokinetics of First-Order Reactions

Wang Cun-Xin,Liang Yi,Wang Wen-Qing,Song Zhao-Hua,Liu Yu-Wen,Qu Song-Sheng   

  1. Departmetn of Chemistry,Wuhan University,Wuhan 430072
  • Received:1996-10-28 Revised:1997-01-13 Published:1997-05-15
  • Contact: Liang Yi

摘要:

用滴定量热法分别建立了满定期和停满反应期一级反应热动力学的数学模型. 根据这两种模型,均可由一次实验的滴定量热曲线同时解析出一级反应的速率常数(k1)和摩尔反应焓(△rHm). 用滴定量热法研究了去离子水溶剂中乙酸乙酯皂化反应的热动力学,实验结果验证了本文用滴定量热法研究一级反应热动力学的适用性.

关键词: 滴定量热法, 一级反应, 热动力学

Abstract:

The mathematical models for thermokinetics of first-order reactions in titration period and in the stopped-titration reaction period have been suggested, respectively, by titration calorimetry. By analyzing the titration calorimetric curve of one experiment of a reaction, these two models can be used to calculate the first-order rate constant (k1) and the molar enthalpy(△rHm) of the reaction. Thermokinetics of the saponification of ethyl acetate in doubly distilled water was studied by titration calorimetry. The reliability of this titration calorimetric method for studying thermokinetics of first-order reactions has been verified by the experimental results obtained.

Key words: Titration calorimetry, First-order reaction, Thermokinetics