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当前位置:首页 问答 小学 英语 ForanelementaryreactionthetemperaturedependenceoftherateconstantisgivenbytheArrheniusequationK(T)=νe^(-Ea/RT)whereνiscalledthepreexponentialfactor(sometimescalledprefactor)andEatheactivationenergy(inkJmol^(–1)).
ForanelementaryreactionthetemperaturedependenceoftherateconstantisgivenbytheArrheniusequationK(T)=νe^(-Ea/RT)whereνiscalledthepreexponentialfactor(sometimescalledprefactor)andEatheactivationenergy(inkJmol^(–1)).
更新时间:2025-06-10 13:59:42 专题:英语
问题描述:

ForanelementaryreactionthetemperaturedependenceoftherateconstantisgivenbytheArrheniusequation

K(T)=νe^(-Ea/RT)

whereνiscalledthepreexponentialfactor(sometimescalledprefactor)andEatheactivationenergy(inkJmol^(–1)).Onecanalsoexpresstheactivationenergyinjoulespersinglemolecule(averysmallnumber),providedonereplacesthegasconstant,R,byBoltzmannconstant,k_B.

我想知道气体常数是怎么用Boltzmann常数来取代的

路长栢回答:   如果我们用Boltzmannconstant来表示UniversalgasconstantR的话,activationenergy的单位就是joulespersinglemolecule了.(一般非常小)   气体常数比Avogadro'sconstant就是Boltzmannconstant.(这一点你从dimensionalanalysis的角度很好理解,看看单位的变化)

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