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Question

Physics Question on Thermodynamics

Starting with the same initial conditions, an ideal gas expands from volume V 1 to V 2 in three different ways. The work done by the gas is W 1 if the process is purely isothermal, W 2, if the process is purely adiabatic and W 3 if the process is purely isobaric. Then, choose the correct option.

A

W 1 < W 2 < W 3

B

W 2 < W 3 < W 1

C

W 3 < W 1 < W 2

D

W 2 < W 1 < W 3

Answer

W 2 < W 1 < W 3

Explanation

Solution

The correct answer is (D) : W 2 < W 1 < W 3

Fig. Graph

Comparing the area under the PV graph
A 3 > A 1 > A 2
⇒ W 3 > W 1 > W 2
Therefore , W 2 < W 1 < W 3 is the correct solution