O2)=mO2) D 0.180 ×35.5kPa=20.0kP 0.320 机学电等数 p(n2)=p-P(NH3)-p(O2 =(133.0-35.5-20.0)kPa =77.5kPap(N2)= p- p(NH3) - p(O2) =(133.0-35.5-20.0)kPa =77.5kPa p n n p )O( )O( 2 2 = kPa5.35 20.0kPa 320.0 180.0 =×=