Question

Explain why no work is done when a gas expands against vacuum

Answer 1

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✒ To Prove:

✏ No work done when a gas expands against vacuum.

✒ Explanation:

✏ Process of gas expansion in vacuum is Isothermal as well as Adiabatic process.

✏ Free expansion is a irreversible process.

✏ Due to isothermal, there is no temperature change and hence no internal energy change occur.

✏ we know that Work = ΔEnergy

✏ Therefore work = 0J