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  4. A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-ieaytc6uj4uo.png />

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

Question

NTA AbhyasNTA Abhyas 2020Thermodynamics

Solution:

Work done by the system $=$ Area of the loop on $P-V$ diagram
$W=-\left(300 - 100\right)\times 10^{- 6}\times \left(200 - 100\right)\times 10^{3}$
$W=-20 \, J$
(As cyclic process is in anti-clockwise sense, the work done is negative)