it could.... but honestly id be suprised if you could detect it with anything short of full lab equipment.

ALL gasses (no exception) expand and contract essentially linearly with temperature. pressures in the tire shouldnt be extreme enough to deviate this

ideal gas law PV=nRT. there is no correction for which type of gas.... its a universal law. so the pressure and volume increase linearly with temp. this is dependant on n, the number of moles of the gas (not to be confused with the number of moles of ATOMS, which is greater for water than oxygen, but this n value is for the whole gas molecule). this is of course for ideal gasses in which intermolecular interactions dont occur. but its pretty close for most cases.

so the whole thing is even IF the other gasses do have an effect on expansion, it will necessarily be very small because nitrogen must contribute to the expansion, and its very similar in size and weight to oxygen. water itself is present at very low percentages. in relative terms... there is no way to justify the claim that such a small component is the cause of drastic changes in tire pressure.

i feel a little like im just repeating myself but thats because gas behavior is actually pretty simple. direct ratios . now, these gasses will deviate a little... but were talking primarily about similarly sized diatomic gasses and one triatomic gas which honestly is pretty small. since all of these gasses are so similar they should behave similarly thermodynamically.

 

does it matter if the tires are rotating? the gravitational pull of the g force should cause the air to amplify the expantion rate causing the air to circulate in a manner subject to the location of the relative hemisphere. or did I miss something.

 

That makes perfect sense to me Cpl...It's quite obvious that the centripetal force caused by the rotation of the tire would cause something like "air" to leak through the actual rubber the tire is made of. If you use "nitrogen" it's bigger, so it doesn't slip through. We can see visually that it's bigger, check it out

air
nitrogen

See which one is bigger? That's why it doesn't leak...

 

LOL I want trichloromethylchloroformate in my tires. Hopfully it will stay there.

 

Getting really serious there, Gorn. Liquid version of phosgene, humm? A little heavy, but the added weight to the tire should help traction. The best part, if someone punches a hole in your tire, the culprit won't be capable of leaving the scene of the crime. lol

 

ill just carve my tires out of a solid chunk of rubber.
/thread