湿空气的容积 m3/kg干空气 v mR mr t mmrt m, m,Mp ma m po ma m p,M v- mRT 分压定律 pM MmR TM V pM = M a mR T m Mp = 湿空气的容积 a a a a a n m M p x p p p n M m = = = a V v m = m3 /kg干空气 M M a a a a a a a m R T M R T m v m M p M m p M = = = 分压定律