First slide

Work done by gas

Question

Starting with the same initial conditions an ideal gas expands from volume V₁ to V₂ in three different ways. The work done by the gas is W₁ if the process is purely isothermal, W₂ if purely isobaric and W₃ if purely adiabatic. Then

Easy

A

W₂ > W₁ > W₃
B

W₂ > W₃ > W₁
C

W₁ > W₂> W₃
D

W₁ > W₃ > W₂

Solution

Process - 2 $\large \to$ Isobaric
Process - 1 $\large \to$ Isothermal
Process - 3 $\large \to$ Adiabatic
In a thermodynamics process, work done by the gas = Area under P-V diagram.

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