Question

The processes $3, 2$ and $1$ represent the respective isobaric, isothermal and adiabatic expansion of one mole of a gas initially at a pressure $P$ from volume $V$ to $2V$ . The work done is

• A. maximum in the process $1$
• B. maximum in the process $2$
• C. minimum in the process $1$
• D. minimum in the process $3$

Answer 1

Answer: (C)

minimum in the process $1$

Answer 2

Work done = area under $P -V$ curve
As area under the $P -V$ curve is maximum for process $3$ and minimum for process $1$, so the work done is maximum in the process $3$ and minimum in the process $1$