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Questions  

3 moles of an ideal mono atomic gas performs a cycle as shown in the   fig. The gas temperatures TA = = 400K, TB= = 800K, TC= = 2400K, TD = =  1200K. What will be the net work done. ( (  line AB and CD are passing through the origin)

a
20J
b
20000J
c
200J
d
2000J

detailed solution

Correct option is B

work done in the process AB and CD are zero as the processes are isochoric. workdone in BC,    WBC =nRTC-TB   and work done DA, WDA= nRTA-TD net work done is nRTC-TB+TA-TD 3X8.332400-800+400-1200  25X 800= 20000

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