Reversible Expansion and Compression

Slow Compression of a Gas

If a fluid expands infinitely slowly, in this case by removing tiny weights from the piston one at a time, the piston never has any significant velocity.

The process path consists of a series of equilibrium states.

In chapter 4, we called this type of process a
quasi-equilibrium process.
We can now see that this is also a

reversible process

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Ch 6, Lesson E, Page 2 - Reversible Expansion and Compression