2 moles of an ideal gas at 293 K is held inside a 2 cm diameter vertical cylinder by a free-floating weight of mass of 9 kg. The pressure outside the cylinder is 9 bar. How much heat must be added to double the volume of the cylinder through a reversible process? What is the final pressure of the gas? *(Cv = 3R/2, Cp = 5R/2)

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