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
ā W 3 > W 1 > W 2
Therefore , W 2 < W 1 < W 3 is the correct solution