1122 is CV 112>2 is system which occupies the cv at instant t 2 tt+at dp: any property of fluid(m, mv,H,e) dΦ B dm The amount of per unit mass The total amount of g in the cv is db=「B Cv1122 is CV . 1*1*2*2* is system which occupies the CV at instant t . d dm   = :The amount of per unit mass  CV cv  = d  cv =  dm The total amount of in the CV is  : t+dt t+dt t t s  : any property of fluid ( , , , ) m mV H E