Comment: Thanks for the tune

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Thanks for the tune

You make a good point.

Stuff 'wants' to flow from high pressure to low pressure. Leave the valve closed and that potential to create heat or work is unrealized.

Buzzing atoms are little antenna emitting and absorbing radiation. If more radiation is emitted than absorbed the atom gets cooler.

The atoms have kinetic energy plus the energy of their orbiting electrons plus each bond in say water is like a little spring and mass system, plus the nuclear vibrations and interactions all comprise the internal energy

We can measure the change in energy and call it Heat capacity. We can change the energy with a heat flow.

Bottom line this changes nothing and our beer can still be cooled.

Free includes debt-free!