Question

In the given $ p-V $ diagram, I is the initial state and F is the final state.
The gas goes from $ I $ to F by (i) $ IAF $ (ii) $ IBF $ (iii) $ ICF $ The heat absorbed by gas is

• A. the same in all three processes
• B. the same in (i) and (ii)
• C. greater in (i) than in (ii)
• D. the same in (i) and (iii)
• E. greater in (iii) than in (i)

Answer 1

Answer: (C)

Initial and final states are same in all the processes hence
$ \Delta U=0 $ in each case By flot
$ \Delta Q=\Delta W $
Area enclosed by curve with volume axis
$ \because $ $ {{(Area)}_{1}}>{{(Area)}_{2}}<{{(Area)}_{3}} $ $ ={{Q}_{1}}>{{Q}_{2}}<{{Q}_{3}} $