Question

Date:
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How long will it take 600ml of H2 gas todiffuse through a porous portion, If 300ml of O2gas diffuse through it in 10 minutes under identical condition?
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Answer 1

Explanation:

ANSWER

According to Graham's law of diffusion,

Rate of diffusion =

t

V

∝

M

1

[Here, M= molecular mass, V= volume and t= time]

Thus, for H

2

gas,

30

200

=k

2

1

......(i)

For O

2

gas,

t

50

=k

32

1

........(ii)

where k is proportionality constant

From equations (i) and (ii), we get

30×50

200×t

=

2

32

t=

200

16

×30×50

=

4

4×30

=30 min