1. The problem statement, all variables and given/known data A compressed cylinder holds nitrogen gas at room temperature. How cold is the gas that is escaping from the cylinder? T(cylinder) = 298 K P(cylinder) = 1.034e7 Pa n = 1 2. Relevant equations PV = nRT 3. The attempt at a solution So since I was not given either the volume of the container or its final volume, I assumed that the initial and final volumes were approximately the same. This may be a fatal flaw to my line of reasoning. Assuming the above is correct, I said: P/V = constant , and therefore: P1/T1 = P2/T2 , where P1 and T1 are the pressure and temperature in the cylinder. I am not sure if I need the adiabatic exponent of f+2/2 in there somewhere or not. Also, I used P2 = 101.3 kPa and yes I put that into Pa before doing the algebra. Without the adiabatic exponent, I went through the algebra and found the temperature of the escaping gas is 2.94 K. This to me doesn't seem like a reasonable answer since that is really cold. However, I do not have a good understanding of what is reasonable since I do not know much about gas temperatures. Any comments on whether or not this is correct or flawed would be greatly appreciated.