----- Original Message ----- 
From: "Denny Esterline" <firmware@tds.net>
To: <piclist@mit.edu>
Sent: Sunday, October 30, 2005 3:42 PM
Subject: [OT:] Thermodynamics question


> A recent discussion with a colleague left me looking for a formula to
> calculate the temperature of a given gas as a function of volume.
>
> I understand PV=nRT, but what if I only change the volume and want to
> calculate both the new temp and pressure? I expect there's an equation
that
> relates specific heat, temperature and volume, but I haven't been able
to
> find it with google (probably a bad choice of search terms), a little
help?

Presenting the one and only combined gas law:
(P1 x V1) / (P2 x V2) = T1/T2

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