Neat!
Thanks Gil.
Chuck
From: [EMAIL PROTECTED]
Reply-To: [email protected]
To: [email protected]
Subject: Re: [F500] tires
Date: Sat, 26 Aug 2006 21:53:16 EDT
In a message dated 8/26/2006 8:11:09 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Then, I wonder what the exact mechanisim is on using Nitrogen to have less
pressure change and less leakage.
Any gas will change pressure over temperature. Why would pure N2 change
less
than an air mix which is about 2/3 Nitrogen anyway? Or is it the lower
water H2O vapor content in N2?
As far as leakage, the gas molecules would have to be larger in order to
leak out less easily.
It's a combination of the effects you mention.
1 - Water vapor - any dry gas will work better than regular air with water
vapor. As the vapor condenses, the pressure drops, and as the temperature
rises, the pressure increases radically. Since there is a state change
involved, it doesn't follow the ideal gas law (PV=nRT)
2 - Nitrogen is effectively inert for our purposes, while O2 and H2 are
reactive, along with some of the other oddball compounds in generic air.
3 - N2 is a larger molecule than H2, CO, or He.
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