83.4滴变的计算ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYA.S,V,T A,SppI,V,TP,,V2,T,VTDA,sA.Sb.恒容过程ymdTT2TncAs-()-.m=nClnv.mTTc.恒压过程p.mdTT-TInCZA,S-T(%)=nClnp,mTT7Zhang Li-qing2019/10/12
S3.4熵变的计算ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYASAysV2,T,P2,V2,T,pr,V,TSp.V,T,A,sA,sd.任意变温过程（或绝热过程）dTrT, nr2 dU + pdvVmAS-A.SAS-JTTTymdTnCrmdT nCpiTy.mpg>nRIn=nRln1VITTJTp8Zhang Li-qing2019/10/12
S3.4滴变的计算ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYA.Sp,V,TAvSpr,V,TP,,V2,T,VTPA.SSd.任意变温过程（或绝热过程）p.mdTncdU + pd2A,S=A,S+A.S=十J1TJTTdTdTncncTT,p.mPip.mpg+ nRln+ nRlnJIJTTTP29ZhangLi-qing2019/10/12
S3.4滴变的计算ZHEIANGUNIVERSTYOSCIENCE&TECHNOLOGYf混合过程B,nBA,nan=n,+nB,yA,yi等T等pT,p,VT,p,VT,p ,V =V +VV-V,p-PAV.→V,p-pBVpn,RlnAS,=n,Rln=n,Rln-nRy, In yAPAJA=n,Rin--nRy,linys=ngRInPAS,= ngRlnVPBJBASmx =AS, +△SB =-nR(yA InyA + yB InyB)=-nRZylny（理想气体，等T,p混合）ASmixB10Zhang Li-qing2019/10/12
83.4滴变的计算ZHEIANGUNIVERSTYOSCIENCE&TECHNODLOG2、环境ΛS的计算Ams-T'dsm-()amb般环境常为大气一Tamb = A, Qamb = amb HCambSQm,是环境与系统实际交换的热=-Qs4ambTambQssHAoSV'SambSTTambamb11Zhang Li-qing2019/10/12