Question

Calculate the work done by the gas in the diagram

• A. $30J$
• B. $20J$
• C. $-20J$
• D. $-10J$

Answer 1

Answer: (D)

$-10J$

Work done = Area under the P - V curve
$W=(80\times {10}^{3}Pa)(250\times {10}^{-6}{m}^3)\frac{1}{2}=10J$
Since the arrow is anticlockwise,
$\therefore$ Work done = $-10J$