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Internal Energy Doubt

I read somewhere that the total internal energy of a compressed gas is less than total internal energy of an expanded gas at the same temperature.

Can anyone explain the reason for this ?

We are talking about real gases and not ideal gases, as for ideal gases internal energy would be same in both the cases.

Note by Ch Nikhil
2 years, 4 months ago

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internal energy is sum of p.e and k.e of all kinds and inc ompressed state there is an increased attraction due to closeness of molecules which lowers k.e hence lowering intenal energy.

- 2 years, 3 months ago