When 1.0 mole of liquid Br2 is converted to Br2 vapour at 25.0oC and 1.0 atm pressure, 7.3 Kcal of heat is absorbed, and 0.59 kcal of expansion work is done by the system. Calculate ΔU for this process

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Hey, I would like to help but I have no idea what this subject is.
Double Pi, if you can't help, do not respond. Leave the question alone.