Question

Starting with the same initial conditions, and 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 

(A) W₂ > W₁ > W₃;

(B) W₂ > W₃ > W₁

(C) W₁ > W₂ > W₃;

(D) W₁ > W₃ > W₃;

Answer 1

Correct option (A) W₂ > W₁ > W₃;

Explanation:

The corresponding p–V graphs (also called indicator diagram) in three different processes will be as shown:

Area under the graph gives the work done by the gas