Question
What is the net work output of a heat engine that follows path ABDA in the figure above, with a straight line from B to D? Why is the work output less than for path ABCDA? Explicitly show how you follow the steps in the Problem- Solving Strategies for Thermodynamics.

$2400 \textrm{ J}$

The work output is less than for $W_{ABCD}$ since the area enclosed by the PV loop is less.

Solution Video