s3.7热力学基本方程式及Maxwell式ZHEIANGUNIVERSTYOSCIENATECHN热力学基本方程式dU = TdS - pdV + SWdH - TdS + Vdp+ sWdA =-SdT - pdV + SWdG = -SdT +Vdp + SW适用于组成恒定的封闭体系Zhang Li-qing2019/10/12
s3.7热力学基本方程式及Maxwell式ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYOUuidvdU =idsdU-TsePayasavau2U = f(s,V)PT一福1asaHaHdpasdsdHaPdH = TdS +VdP5二au1818H = f(S,P)Fav=V-aOAaT2aHdA=dv%dA =-SdT -PdVavop-a?A= f(T,V)=-POGOGdGdTrdp十OTTapdG = -SdT + VdP行a1aaGG = f(T,P)=VSap3Zhang Li-qing2019/10/12
s3.7热力学基本方程式及Maxwell式ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYauOUsdidu:ds+o二dU=Tds-PdvasOIauCUU = f(s,V)LST/avasaHaHdpdH =pdsXasapdH = TdS +VdPsa1alaH818H = f(S,P)T%=V-aOAOaTdA=rdvdA =-SdT -PdV0Sav--a?A= f(T,V)=-POGOGap8dGrdpdT十OTOTapdG= -SdT +VdPaa15aGG= f(T,P)=VSap4Zhang Li-qing2019/10/12
Maxwell关系式ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYauaH / 3%a ae dU =TdS - pdV1dH = TdS +VdpdA=-SdT - pdVSdG=-SdT + Vdp3aP=aT2VCSBZhang Li-qing2019/10/12
Maxwell关系式的应用ZHEIANGUNIVERSSCIENCE&TECHNOou（1）求U等温时随V的变化关系理想气体: dU = Tds - pdv令等温对V求偏微分pV=nRTasnRT2pP=VOVopauasp(Maxwell式)7paalavnRauop7p=0Vaaa，值，即等温时只要知道气体的状态方程，就可得到av热力学能随体积的变化值。Zhang Li-qing2019/10/12