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Topic: Calculating ratio of effusion rate between two gasses?  (Read 10563 times)

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Offline StillLearning

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Calculating ratio of effusion rate between two gasses?
« on: October 05, 2008, 01:29:43 PM »
Here's the problem:

Calculate the ratio of effusion rates for Ar and Kr.

rate (Ar) / rate (Kr) = ?


I suspect it has someting to do with the average velocity formula v=square root of 3RT/M, but i'm not sure where to start.
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Offline Borek

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Re: Calculating ratio of effusion rate between two gasses?
« Reply #1 on: October 05, 2008, 01:45:43 PM »
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Offline wpenrose

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Re: Calculating ratio of effusion rate between two gasses?
« Reply #2 on: October 05, 2008, 01:46:21 PM »
You're exactly right, as far as you went. Keep going.

Dangerous Bill
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Offline StillLearning

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Re: Calculating ratio of effusion rate between two gasses?
« Reply #3 on: October 05, 2008, 02:01:30 PM »
Quote from: wpenrose on October 05, 2008, 01:46:21 PM
You're exactly right, as far as you went. Keep going.

Dangerous Bill


The problem doesnt say anything about temperature.  Do I just assume 273 Kelvin?
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Offline StillLearning

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Re: Calculating ratio of effusion rate between two gasses?
« Reply #4 on: October 05, 2008, 02:04:36 PM »
I tried it with 273 K and got the right answer.  As always, thanks for the help.   :)
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Offline wpenrose

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Re: Calculating ratio of effusion rate between two gasses?
« Reply #5 on: October 05, 2008, 02:54:15 PM »
Um, if you do it right, temperature cancels out...

DB
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