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) = n R Delta T = nr (T_(3) - T_(2))`
`W_(DA) = nRT (T_(1) - T_(4))`
Total work done `= W_(BC) + W_(DA) = nR (T_(1) + T_(3) - T_(4) - T_(2))`