Yes.MoonUnit said:So, what is actually going on in Bob's scenario? As I see it, the volume decreases, the pressure increases, work was done in compressing it - so the average KE of the particles must be higher - therefore higher T.
Generally, you assume no energy is exchanged with the surroundings - only with the compressor. That's what krab was saying: "adiabatic" means without exchanging heat with the environment. Ie, the only energy input/output comes from the compressor.I'm not doubting you - but I just don't quite get this bit. Maybe I'm missing an assumption here? Is the system exchanging energy with the surroundings as the gas is compressed? If that were happening at a rate which compensates for the work done on the gas, I think I get it.
If not I'm completely perplexed....