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Question on diffusion of gases and question on hydrogen gas

label Chemistry
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1.Describe an experiment to show that a lighter gas diffuses faster than a heavier one. 

2.If a gas A is 9 times as heavy as hydrogen which will diffuse faster ,and by what factor?

Oct 20th, 2017

1.  Here is an experiment to show that a lighter gas diffuses faster than a heavier one.

    Take two balloons. Fill one with helium gas and the other with air. Now let the helium balloon deflate. Record the  time for complete deflation. Then deflate the balloon with air. Note the deflation time.

You will find that the time to deflate helium balloon is way less than the time to deflate air balloon.

2.  Hydrogen  will diffuse faster and  by a factor of 3.

    Explanation:  Deflation time depends on the velocity of a gas and the Graham's law of diffusion gives the relation square root ( m1 /m 2)  = v 2 /v1 where 1 is heavy gas and 2 is lighter gas.

Apr 11th, 2015

I have answered your question.

Niru

Apr 11th, 2015

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