Question
Question: A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is ...
A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is –
A
20 J
B
–20 J
C
400 J
D
–374 J
Answer
–20 J
Explanation
Solution
Work done by the system = Area of shaded portion on P-V diagram
= (300 – 100) 10–6 × (200 – 10) × 103 = 20 J