Two litres of an ideal gas at a pressure of 10 atm expands isothermally into a vacuum until the total volume becomes 10L. Which of the following is correct?

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q = 0, w = 0

q ≠0, w≠0

q = 0, w≠0

q ≠0, w = 0

answer is A.

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Detailed Solution

Expansion in vacuum, i.e., at Pext=0, w=P∆V=0×10-2=0Also, for expansion in vacuum q = 0.

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