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Ideal Gas Law - Real Life Question?
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[QUOTE="Monday, post: 5469280, member: 519564"] Hi Guys and Gals, As I was pumping up a flat bike tyre, a weird thought occurred to me about the application of the ideal gas law. Once the tyre essentially finds its physical dimension limitations (i.e. is shaped like a bike tyre and no longer changing shapes) and starts putting in reasonable volumes of air, let's say up to 60-70lbs/in^2, why doesn't the tube get stupidly hot - in essence, the pressure is going from say 1 atmosphere to 3-5 atmospheres of pressure, but the physical space is not changing. By extension, you could equally apply the same concept to scuba tanks that go even way higher in pressure than a bike tube (and there definitely isn't any change to vessel shape)! The ideal gas law would suggest holding volume constant, by changing pressure, the only other variable is temperature. So yeah, the valve on the tube gets a little bit warm, but its hardly finger frying, 3rd degree burn territory. Any thoughts would be appreciated! Cheers, M [/QUOTE]
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