In a far planet from earth, a balloon containing a certain gas expands from 100 L to 250 L by performing a work on its surroundings. At the same time, 450 J of heat is transferred from the surroundings to the system. The total change in the internal energy of system is 82 J. Calculate the pressure against which the gas in the balloon was working? (1 L.atm = 101.325 J)

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