Question

Calculate the work done by the gas in the state diagram shown.

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

Answer 1

Answer: (D)

Work done $=$ Area under the $P-V$ curve
$W=(80kPa)\left(250\times 10^{-6}\right)kt1/2=10J$
Since the arrow is anticlockwise,
$\therefore$ Work done $=-10J$