Arrhenius经验公式的推导及Ea的本质(4)

Arrhenius方程

绍兴文理学院学报(自然科学) 第30卷8 魏鸿恩.热力学函数关系图方法 J .西安建筑科技大学学报,1997,1:27-29.

9 张兰知,谢学坤.热力学的几体表述 J .哈尔滨师范大学自然科学学报,2002,2:31-35.

NewMnemonicDiagramforThermodynamicRelationships

LVShenzhuang

(CollegeofChemistryandlifescience,LeshanNormalCollege,SichuanLeshan614000)

Abstract:Twokindsofnewgraphsformemorythebasicthermodynamicrelationshipshavebeendesignedinthispa per.Oneisavectorgraph,theortherisanarcgraph.Itiseasyforcollegestuendentstorememberthethermodynamicrelationshipexpressionsaccordingtothegraphs.

Keywords:thermodynamic,basicrelationalexpression,vectorgraph

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DerivationoftheArrheniusEquationandtheNatureofEa

YanHuaiyi WangYingjin

(DepartmentofChemistry,XinzhouTeachersCollege,Xinzhou,Shanxi,034000)

Abstract:EaisreferredtoastheactivationenergyinArrheniusempiricalequationbyArrhenius,meaningthediffer encebetweentheaverageenergyofactivatedmolecularandthatofnon-activatedmolecularinelementaryreaction.However,theelementaryreactiondoesnothavetheintermediatestate(activatedmolecule),andthereactionspossess ingtheintermediatestate(activatedmolecule)cannotbereferredtoastheelementaryreaction.ThenatureofEaisnotclearlyexpressedintheArrheniusempiricalequation,theactivationenergy(Ea)andrateconstant(k)nottheo reticallycalculated.Therefore,itisverysignificanttoderivetheArrheniusempiricalequationandseekthenatureofEa.ThispaperendeavorstoderivetheArrheniusempiricalequationsgroundeduponthethermodynamictheory,andul timatelyconfirmsthattheEaistheGibbsfreeenergyofresultant(-Gom,B)orGibbsfreeenergyofreactant(-Gom,B).

Keywords:thermodynamic;theoreticalderivation;Arrheniusempiricalequation;activationenergy;nature