Root mean square velocity of CO2 molecules


by Plasma
Tags: molecules, root, square, velocity
Plasma
Plasma is offline
#1
Feb26-08, 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.
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes
Astronuc
Astronuc is offline
#2
Feb26-08, 08:57 AM
Admin
Astronuc's Avatar
P: 21,637
A good reference.
http://hyperphysics.phy-astr.gsu.edu...kintem.html#c2

But knowing that V^2 = (3kT)/m and that the H2O and CO2 have the same temperature T, what can one say about V2/m for each molecule?
Plasma
Plasma is offline
#3
Feb26-08, 09:15 AM
P: 37
They must be the same.


Register to reply

Related Discussions
Root-mean-square velocity Introductory Physics Homework 3
Square root of -1..... General Math 36
Square root General Math 13
Square Root Calculus 4
Square root of pi General Math 23