Question

A given mass of a gas expands from state A to B by three different paths 1, 2 and 3 as shown in the figure. If W₁, W₂ and W₃ respectively be the work done by the gas along the three paths, then

(A) W₁ > W₂ > W₃     

(B) W₁ < W₂ < W₃ 

(C) W₁ = W₂ = W₃             

(D) W₁ < W₂, W₁ < W₃  

Answer 1

Correct option: (B) W₁ < W₂ < W₃

Explanation:

Work done = area under the P → V curve.

From the graph, area is minimum for curve 1 and maximum for curve 3.

∴  W₁ < W₂ < W₃