∑y、a) bn=∑b SRK方程 RT v-b v(v+b) a1=ac·aa(r) a=0.42748R272=/P an2={+m-(/,)] m=0.48508+1.551710,-0.15613a2 a=②a) b=∑yb RT I+V Zm=PV/RT=V/v-b)-a/rTV ④= b 2 V, RTV K,=Vi_rii (2-17) p 当x1→1时,作1→1 n=f/x. (2-19)( ) 2 m =  i ai a y m =  ibi b y SRK 方程： v(v b) a v b RT P + − − = ai ac,i  i(T ) = • c,i c,i i ac, R T P 2 2 = 0.42748 ( )   ( )  2 0.5 i T = 1+ mi 1- T Tc,i i mi i 2 = 0.48508 +1.55171 − 0.15613 ( ) 2 =  i ai a y =  ibi b y  + − = 0      − + P ab V P a V P RT Vt b t t 3 2 ( ) Zm = PVt RT =Vt Vt − b − a RTVt t i m t i i RTV aa ln Z V b b ˆ ln 2 V b 1- t  −              − −  = ˆ P f x y K V i oL i i i i i   = = (2-17) 当 xi →1 时，  i →1 (2-18) L i i L i i f ˆ f x ˆ  = (2-19) v - dP 1 ln P 0 i i L        = P RT P RT f (2-20)