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Topic: Which fraction is bigger which has a certain amount of velocity? (KM theory)  (Read 1680 times)

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Offline azurken

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Which fraction is bigger which has a certain amount of velocity? (KM theory)
« on: September 18, 2012, 02:59:18 AM »
The fraction of CH4 molecules with velocities greater than 500 m/sec, or the fraction of NH3 molecules with velocities greater than 500 m/sec at the same temperature. I'm not sure how to actually approach this one.

The last few problems were plug and chug from Vrms, KEavg and Vmp formulas. Am I supposed to use Vavg formula?
where avg of velocity = sqrt(8RT/πM)
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Offline DrCMS

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Re: Which fraction is bigger which has a certain amount of velocity? (KM theory)
« Reply #1 on: September 18, 2012, 04:18:37 AM »
Which has the higher mass?
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Offline azurken

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Re: Which fraction is bigger which has a certain amount of velocity? (KM theory)
« Reply #2 on: September 18, 2012, 04:20:36 PM »
Assuming it's just a mole of each, CH4 has the higher mass.
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Offline DrCMS

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Re: Which fraction is bigger which has a certain amount of velocity? (KM theory)
« Reply #3 on: September 19, 2012, 04:06:31 AM »
Check your maths again
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