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Q.

Under isothermal condition, a gas at 300K expands from 0.3L to 0.45L against a constant external pressure of 3 bar. Work done during the process is  (1 lit – bar = 100 J).

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a

-45J

b

5KJ

c

-30J

d

+45J

answer is A.

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Detailed Solution

W = -3(0.45 - 0.3) = -0.45 lit- atm= -45J

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Under isothermal condition, a gas at 300K expands from 0.3L to 0.45L against a constant external pressure of 3 bar. Work done during the process is  (1 lit – bar = 100 J).