Q.20 An ideal gas occupies an unknown volume V liters (L) at a pressure of 12 atm. The gas is
expanded isothermally against a constant external pressure of 2 atm so that its final volume
becomes 3 L. The work involved for this expansion process is ________cal. (Round off to
two decimal places)
(Gas constant R = 0.082 L atm mol–1 K
–1 = 2 cal mol–1 K
–
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sorry I don't know..........
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