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In a mechanical power cycle, the air contained in a piston-cylinder occupies 0.004 m3 and undergoes an adiabatic expansion process. If the process is reversible and air is considered an ideal gas, determine the entropy change of the gas, knowing that the ambient temperature is 300.15 K. a) 0 J/K b) 300.15 J/K c) 1.33 × 10 – 5 J/K d) 75 037.50 J/K

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