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A piston-cylinder system contains 2 kg of ammonia gas at a pressure of 2 MPa and a temperature of 400 K. The gas is

A piston-cylinder system contains 2 kg of ammonia gas at a pressure of 2 MPa and a temperature of 400 K. The gas is expanded adiabatically and reversibly to a final pressure of 800 kPa. Determine the final temperature and the work done by the gas during the expansion.

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