The figure here shows four paths on a p-V diagrams along which as gas can be taken from state i to state f. Rank the paths according to -
the work W done by the gas.
4 > 3 > 2 > 1
The work done in a process is equal to the area under the p-V graph. From this we see that the work done by process 4 > 3 > 2 > 1.