Question

One mole of an ideal gas undergoes a cyclic process $ ABCDA $ as shown in the $ P-V $ diagram, Tire net work done in the process is
$ (1\, atm = 10^6 $ dyne $ cm^{-2} $ )

• A. $ 500\,J $
• B. $ 700\,J $
• C. $ 800\,J $
• D. $ 900\,J $

Answer 1

Answer: (C)

From the P-V diagram,
Work done, $W =$ area under the $P - V$ diagram
$
\begin{aligned}
W &= AB \times BC \\
W &=2 \text { litre } \times 4 atm \\
W &=2 \times 10^{-3} \times 4 \times 1.03 \times 10^{5} \\
W &=8 \times 100 \\
W &=800 J
\end{aligned}
$