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Re: [Phys-l] polytropic Sackur-Tetrode

On 01/20/2010 12:02 PM, chuck britton wrote:
Wouldn't gamma be T dependent, as more modes become 'available'.

Sure. The whole idea of "polytropic" is just an
approximation, valid over a _limited_ temperature
range ... but sometimes the range is large enough
have genuine practical value. In particular, it's
not a coincidence that we have gamma = 1.4 for N2,
O2, CO, and dry air under a wide range of ordinary