A thermodynamic system is taken through the cyclic PQRSP process. The net work done by the system is

Question

A thermodynamic system is taken through the cyclic PQRSP process. The net work done by the system is (A) 20 J (B) -20 J (C) 400 J (D) -374 J

Tardigrade Admin · Accepted Answer

Work done by the system = area of shaded portion on P-V diagram. =(300-100) 10-6 ×(200-100) × 103=20 J And direction of process is anticlockwise so work done will be negative, i.e., Δ W=-20 J.

Q. A thermodynamic system is taken through the cyclic $PQRSP$ process. The net work done by the system is

$20 J$

$- 20 J$

$400 J$

$- 374 J$

Work done by the system $=$ area of shaded portion on $P - V$ diagram.
$= (300 - 100) 1 0^{- 6} \times (200 - 100) \times 1 0^{3} = 20 J$
And direction of process is anticlockwise so work done will be negative, i.e., $Δ W = - 20 J$ .

Q. A thermodynamic system is taken through the cyclic PQRSP process. The net work done by the system is

20J

−20J

400J

−374J