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Q.

An ideal gas is expanded isothermally from 2dm3 to 12 dm3 against 2 atm pressure. Work done is

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a

48 lit –atm

b

24 lit–atm

c

20 lit –atm

d

12 lit–atm

answer is C.

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Detailed Solution

W = -pext[Vfinal - Vinitial] = -2atm[12 - 2] = -20 lit - atm

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An ideal gas is expanded isothermally from 2dm3 to 12 dm3 against 2 atm pressure. Work done is