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

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 _ (Gas constant R= 0.082 L atm mo' K=2 cal mo K') 57.} cal. (Round offto two decimal places). IGATE 2019]