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Calculate the work done by the system in...

Calculate the work done by the system in an irreversible (single step) adiabatic expansion of 2 mole of a polyatomic gas `(gamma=4//3)` from 300 K and pressure 10 atm to 1 atm :

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The correct Answer is:
`-7kJ "mole"^(-1) K^(-1)`
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