Question

2. A thermodynamic system is taken through the cycle PQRSP proces
the system is (1 cubic meter = 10^6 cubic centimeter)
en through the cycle PQRSP process. The net work done bythr system is ​

Answer 1

the net work done= P×change in volume

from the figure ,

PS & RQ are iso choric processes and work done by iso choric process is zero

so the net work done is the sum of work done by PQ & RS

work done by PQ= 100Kpa×200cc

=(10×10^4pa)×(2×10^-4)m^3

=20J

work done by RS=200Kpa×-200cc

=(20×10^4pa)×(-2×10^-4)m^3

=-40J

net work done = 20J-40J

= -20J

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