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Ha, good point.
When they scan for "nitrogen", they're actually looking for nitrogen that's bonded in certain ways to other elements (probably carbon and hydrogen). It's just easier to say that they're scanning for nitrogen, compared to "scanning for certain types of compounds that contain nitrogen atoms" .
A little googling suggests that N2 is a bit _more_ sensitive to temperature than O2 or air.
http://encyclopedia2.thefreedictionary.com/Thermal+Expansion
Not much more, ideal gas law and all, but 0.2% more sensitive.
Ha, good point.
When they scan for "nitrogen", they're actually looking for nitrogen that's bonded in certain ways to other elements (probably carbon and hydrogen). It's just easier to say that they're scanning for nitrogen, compared to "scanning for certain types of compounds that contain nitrogen atoms"
The nitrogen that makes up the majority of the atmosphere is diatomic nitrogen gas (N2), which is very chemically inert. N2 gas is actually used in various industrial processes to prevent combustion/explosions.
Is that true? Per the ideal gas law, 02 and N2 should have the same sensitivity to different pressure/temperature/volume scenarios. I'd be interested to learn if there's an explanation for this that's outside the ideal gas assumptions.
While I'm not sure about the N2 - O2 comparison I can say this: the machines we use at my dealership pull all the air out of the tire and replace it with only N2. Think of something like a dialysis machine. When people generalize the N2 O2 comparison in regards to tires they're generally replacing 'normal air' with O2.