At 20ºC two balloons of equal volume and porosity are filled to a pressure of 2 atm, one with 14 kg N2 & other with 1 kg H2 . The N2 balloon leaks to a pressure of 1/2 atm in one hour. How long will it take for H2 balloon to leaks to a pressure of 1 atm.
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Dear student,

According to graham's law of diffusion,

Since pressure drop is same for both,
Putting the values in the above expression will give

Pressure dropN260 minPressure dropH2t=140002810002228On solving t=16 mins

Hope this helps,


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