Re: OT Nitrogen in Tires

Posted by James22 on July 15, 2007 at 07:35:36 from (207.179.239.51):

In Reply to: Re: OT Nitrogen in Tires posted by 135 Fan on July 14, 2007 at 22:33:05:

You need to get the old chemistry books out. Air is already over 78% nitrogen with 21% oxygen and 1% trace elements. A nitrogen atom has an atomic weight of 14 and oxygen 16. Nitrogen molecule has two nitrogen atoms which gives nitrogen gas an atomic weight of 28. Dry air with all of its components has an average atomic weight of 28.97. Depending on moisture content this number for air will be slightly lower. No doubt some air pressure loss can be contributed to the loss of the "light" trace element gases hydrogen and helium but this would occur over a long interval. The big advantage to nitrogen is it will not oxidize the rubber, consequently "destruction" of the tires is only ocurring on the outside, not happening on the inside.

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