A sample of gas expands from V₁ to V₂. In which of the following, the work done will be greatest? (a) Same in all processes (b) Isobaric process (c) Isothermal process (d) Adiabatic process

Answer: (b). Work done = area under the P - V curve from V₁ to V₂. From the graph, the isobaric line lies above the isothermal curve, which lies above the adiabatic curve. So the area, and the work, is largest for the isobaric process. So the answer is (b) Isobaric process.

A sample of gas expands from V₁ to V₂. In which of the following, the… | JEE Main 2013 (25 Apr, Shift 1)

Q234JEE Main 2013 · 25 APR · SHIFT 1Easy

Thermodynamic Processes

A sample of gas expands from $V_1$ to $V_2$ . In which of the following, the work done will be greatest?

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Answer: (b)

Work done = area under the $P$ - $V$ curve from $V_1$ to $V_2$ .
From the graph, the isobaric line lies above the isothermal curve, which lies above the adiabatic curve.
So the area, and the work, is largest for the isobaric process.
So the answer is (b) Isobaric process.

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