Hello, I understand when you release a compressed gas generally it comes out cooler than atmosphere. But here are my questions: When you fill the container, the gas warms up as the pressure builds. Generally it takes a long time to compress and I believe the temperature of the gas when it's released will vary by the rate of release. Is there anyway to calculate what the temp will be based on Total vol. of the container, pressure at the time of release and the rate of release? Also If you compress it and immediately release it, what is the temp change compared to if you compress it today and let the container cool to ambient tomorrow? Or if you put the container in the freezer overnight? How much cooler would the gas coming out be? (assume just general air for the gas.) Now what if the air being released it then feed into a vortex tube (aka Maxwell's Demon.) Will the vortex tube separate the released air into even colder air on the cold side then what comes out of the container? Ie, the air released would be concentrated into the warmest parts and coldest parts, so the resulting air would be even lower than what it comes out of the container? (Since what comes out of the container is an average of all the air molecules.) And if this true, then is there some way to calculate how much (% of the original containers vol.) going to the "hot" and "cold" sides? Sorry for such a long question, but it's a question I have been trying to understand now for a long time. Trying to quantify is as much as possible. Thank you.