9 a sample of argon gas at 1 atm and 27°c expands reversibly and adiabatically from 1.25 iitre to 2.50 litre. the change in enthalpy approximately is (a) 11.5 j

9 A sample of Argon Gas at 1 atm and 27°C expands reversibly and adiabatically from 1.25 Iitre to 2.50 litre. The change in enthalpy approximately is (a) 11.5 Joule (b) 272 Joule (c) 115 Joule One mole of monoatomic ideal gas expands adiabatically at initial temperature T against a constant (d) 0