河北工业科技2018，Vol.35Issue(1)：18-23,6.DOI:10.7535/hbgykj.2018yx01004
van't Hoff方程及相关问题的讨论
Discussion on van't Hoff equation and related problems
摘要
Abstract
van't Hoff equation is the equation describing the relationship between chemical equilibrium constant and tempera-ture,and there is the equation so-called"chemical reaction isobaric equation"and"chemical reaction isochoric equation".In the current textbooks,the derivation of these equations is not strict,even incorrect,and there is no explanation for the meaning of"equal pressure"and"equal capacity".This makes difficulties in the use of the equation,resulting in many wrong conclusions, and leads to confusion in the derivation of the relationship between activation energy and reaction heat.Starting from the state function of the chemical potential,it is proved that the molar reaction Gibbs function is also a state function.Based on this,the van't Hoff equation is introduced using rigorous mathematical and thermodynamic concept.It is also proved that the two forms of the van't Hoff equation,the so-called"chemical reaction isobaric equations"and"chemical isometric equations",are not related to isobaric and isometric.It's just a habit name.On this basis,the relationship between Arrhenius activation energy and constant pressure reaction heat and constant volume reaction heat of the ideal gas chemical reaction is strictly derived.This study clarifies the van't Hoff equation and the use conditions of the equation of arbitrary and perfect gas reactions,and lays the foundation for the correct realization and application of the relationship between perfect gas reaction activation energy and the reaction heat in the thermodynamics field.关键词
化学热力学/van't Hoff方程/恒压反应/恒容反应/理想气体/活化能Key words
chemical thermodynamics/van't Hoff equation/isobaric reaction/isochoric reaction/perfect gas/activation energy分类
化学化工引用本文复制引用
任聚杰..van't Hoff方程及相关问题的讨论[J].河北工业科技,2018,35(1):18-23,6.基金项目
河北省高等教育教学改革研究项目(2012GJJG073) （2012GJJG073）
河北科技大学教育教学改革研究项目 （）
