Question

short note on free expantion
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Answer 1

Explanation:

A free expansion of a gas can be achieved by moving the piston out faster than the fastest molecules in the gas

hope you understand

Answer 2

The Joule expansion, in which a volume Vi = V0 is expanded to a volume Vf = 2V0 in a thermally isolated chamber.]]



A free expansion of a gas can be achieved by moving the piston out faster than the fastest molecules in the gas.



This free expansion is irreversible but can be quasi-static for each chamber: quasi-equilibrium is retained for each part but not for the whole system

The Joule expansion (also called irreversible process in thermodynamics in which a volume of gas is kept in one side of a thermally isolated container (via a small partition), with the other side of the container being evacuated. The partition between the two parts of the container is then opened, and the gas fills the whole container.

The Joule expansion, treated as a thought experiment involving ideal gases, is a useful exercise