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Root mean square velocity of CO2 molecules 
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#1
Feb2608, 08:21 AM

P: 37

1. The problem statement, all variables and given/known data
If the translationa speed of the water vapor molecules (H2O) in ir is 648 m/s, what is the translational rms speed of the carbon dioxide molecules in the same air? Both gases are at the same tmperature. 2. Relevant equations V^2 = (3kT)/m 3. The attempt at a solution I'm not even sure where to begin. I don't understand how knowing the water's speed helps me find the CO2's. 


#2
Feb2608, 08:57 AM

Admin
P: 21,873

A good reference.
http://hyperphysics.phyastr.gsu.edu...kintem.html#c2 But knowing that V^2 = (3kT)/m and that the H_{2}O and CO_{2} have the same temperature T, what can one say about V^{2}/m for each molecule? 


#3
Feb2608, 09:15 AM

P: 37

They must be the same.



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