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For N2 : Initially, P1=2 atmw1= 14 kg              (diffusion time 1 hr)After diffusion, P2=12atmw2=?Since at constant V and temperature, for a gasP α wTherefore, P1P2=w1w2or, 212=14w2or, w2=144kg N2Therefore, weight of N2 diffused in 1 hr=14-144=212 kgSimilarly for H2Initially P1=2 atm  w1=1 kg                 (diffusion time t hr)After diffusion, P2=12atmw2=?Again, P1P2=w1w2or, 212=1w2or, w2=14kg H2Therefore, weight of H2 diffused=1-14=34For diffusion of N2 and H2tH2= 1hr = 60 minwH2tH2×tN2wN2=MH2MN2(34)(212)×60t=228Therefore, t= 16 minute
here,t be the required time.
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