Question

An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A → B → C → A as shown in the diagram. The total work done in the process is _____ J.

Answer 1

Correct answer is : 200

Work done is given by area enclosed in the P vs V cyclic graph or V vs P cyclic graph. 

Sign of work is positive for clockwise cyclic process for V vs P graph.

\(W= \frac {1}{2} \times (30-10)\times (30-10) = 200 kPa - dm ^3 \)

= 200 x 1000 Pa - L = 2 L-bar = 200 J