Air is contained in a cylinder fitted with a frictionless piston. Initially the cylinder contains 0.5...

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Air is contained in a cylinder fitted with a frictionless piston. Initially the cylinder contains 0.5 m of air at 1.5 bar, 20C. The air is then compressed reversibly according to the law pv" = constant until the final pressure is 6 bar, at which point the temperature is 120C. Determine: (a) the polytropic index n, (b) the final volume of air, (c) the work done on the air and the heat transfer, and (d) the net change in entropy. Air is contained in a cylinder fitted with a frictionless piston. Initially the cylinder contains 0.5 m of air at 1.5 bar, 20C. The air is then compressed reversibly according to the law pv" = constant until the final pressure is 6 bar, at which point the temperature is 120C. Determine: (a) the polytropic index n, (b) the final volume of air, (c) the work done on the air and the heat transfer, and (d) the net change in entropy.