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Q.

An ideal gas occupying a volume of 2 dm3 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

10 dm3, 1000 J

b

8 dm3, –800 J

c

10 dm3, –800 J

d

10 m3, –1000 J

answer is C.

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Detailed Solution

W = - PΔV = -1(10-2) = - 8 lit- bar                                = - 8x100                                = -800 J
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An ideal gas occupying a volume of 2 dm3 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