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Q.

An ideal gas occupying a volume of 2dm3 and a pressure of 5 bar undergoes isothermal and irreversible expansion against external pressure of 1 bar. The final volume of the system and the work involved in the process is 

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a

10dm3,-800J

b

8dm3,-800J

c

10dm3,1000J

d

10m3,-1000J

answer is C.

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Detailed Solution

P1V1=P2V2

2×5=1×V2

V2=10

W=−PdV 

W=−110−2

W=−8 lit bar  ; 1bar-lit=100J

=−800J

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