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Re: Physics guys, help us out... Posted by JimBlake [Email]  (#141)  [Profile/Gallery]
(more from JimBlake) on Thu, 22 Jan 2009 10:34:41
In Reply to: Is nitrogen exempt from the Ideal Gas Law?, Bill Homer  [Profile/Gallery]
, Thu, 22 Jan 2009 09:33:22
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Bill, you beat me to it...
Nitrogen vs. Air
N2 has 3% lower molecular weight than "average" air
3% lower density (at same T & P)
2.8% lower viscosity
2.8% higher specific heat
Not much difference to get exited about. I found atomic radii, but not molecule size.
It doesnt seem like the dipole moment of water vapor would have any influence over what goes on inside a tire.
Does oxygen diffuse thru rubber faster than nitrogen, by lattice dislocations or anything obscure like that? I didn't know how to look that up.
Oxygen (especially ozone) would contribute to oxidation, but c'mon... when was that last time a tire rotted from the INSIDE? Seems like UV exposure to the outside would dominate tire degradation.
I see pressure swings due to temperature on a weekly basis, so I'm not going to get a bottle of N2 just so I can adjust tire pressures on saturday morning.
, Thu, 22 Jan 2009 09:33:22, Thu, 22 Jan 2009 10:34:41 <-- Viewing This Message
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