P-T curve of a cyclic process is shown. Find out the works done by the gas in the given proces if number of moles of the gas are n.

Explanation

Since path `AB` and `Cd` are isochoric therefore work done during `AB` and `Cd` is zero. Path `BC` and `DA` are isobaric.
Hence `W_(BC) = nRT DeltaT = nRT (T_(3)-T_(2))`
`W_(DA) = nRT (T_(1)-T_(4))` Total work done `= W_(BC) +W_(DA) = nRT (T_(1) +T_(3)-T_(4)-T_(2))`