Work done by a gas in the process shown in the figure will be
Work done by a gas in the process shown in the figure will be
positive
negative
zero
cannot be determined
Solution
We know that, the work done in cyclic thermodynamic process is equal to the area under $p-V$ curve.
$\therefore W_1=$ work done in expansion from $C \rightarrow D \rightarrow A$ is positive
and $W_2=$ work done in compression from
$A \rightarrow B \rightarrow C$ is negative.
It is clear from the figure,
$\therefore$ Net work done, $W=W_1-W_2 < 0$
