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IESL Part II Mechanical Practice Questions - IESL Qualifying Examination Part II - Mechanical Engineering Exam

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A piston-cylinder device contains 0.1 kg of air initially at a pressure of 2 MPa and temperature of 350°C (623 K). The air undergoes a polytropic expansion to a final pressure of 0.2 MPa. If the polytropic index is n = 1.3, calculate the boundary work done by the gas during this process. (Take the gas constant R = 0.287 kJ/kg·K).
Correct Answer:
24.6 kJ

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