Atmospheric air can be treated as a binary mixture(二元混合物) of ideal gases, dry air and moisture Dry air: Paav= marat Ra=83144l/289645=287.055J(kgK) Water vapor: pV=mdar t Rn=831441/1801528=461.520J/(kgK)Atmospheric air can be treated as a binary mixture (二元混合物） of ideal gases, dry air and moisture Rda = 8314.41/28.9645 = 287.055 J/(kg·K) Rw = 8314.41/18.01528 = 461.520 J/(kg·K) Dry air: pdaV= mdaRdaT Water vapor: pwV= mdaRwT