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A sample of gas expands from volume V₁ to V₂. The amount of work done by the gas is greatest, when the expansion is

1. adiabatic
2. isobaric
3. isothermal
4. equal in all cases

Correct answer: isobaric

Solution

In an isobaric process, the pressure remains constant, and the work done is given by W = PΔV. For the same change in volume, the work done is maximum in an isobaric process compared to adiabatic or isothermal processes.

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