[Pulcinella]

I didn’t mean that there would be no temperature changes. But that in the example where you allow the gas to expand into a new volume there would be no temperature change. Remember, temperature relates to the speed the gas particles are moving. If the barrier between the two sides of the container was removed and the gas allowed to expand into that new volume, why would the ideal gas particles slow down and decrease the temperature?

[bernulli]

I did miss the part where the original comment was restricted to JT. Thanks!