理想气体变化过程中物理量的计算Q=AE+WPV"=d热传递Q内能AE作功W=[PdV等压变W,= P(V, -V)m Cp.m(T, -T)化Qp=W.-RMR(T, - T)n=0tYRThKW.=-RTnKT1Qr=等温变MMVV化W=-RTnQ=%RTn=1M"PM"P2AE=mCym(T, -T)M等体变化mCuCv,m(T, -T)0Qn→0M绝热过W=PV-PV0程y-1n=y多方过W-PV-PVmQCn,m(T, - T)程nn-1M.RCP.m-PV="RTCv,m2R=Cp,m-C-
理想气体变化过程中物理量的计算 PV C n = Q = E +W 热传递 Q 内能 E 作功 W = PdV 等压变 化 n = 0 ( ) C , T2 T1 M m QP = P m − ( ) C , T2 T1 M m E = V m − ( ) WP = P V2 −V1 ( ) R T2 T1 M m WP = − 等温变 化 n =1 1 2 ln V V RT M m QT = 2 1 ln P P RT M m QT = 1 2 ln V V RT M m WT = 2 1 ln P P RT M m WT = 等体变 化 n → ( ) C , T2 T1 M m QV = V m − 0 绝热过 程 n = 0 1 1 1 2 2 − − = PV PV W 多方过 程 n ( ) C , T2 T1 M m Qn = n m − 1 1 1 2 2 − − = n PV PV W RT M m PV = n m CV m n n C , , −1 − = = − = P m V m V m P m R C C C C , , , , − = − = C R R C P m V m 1 1 , ,