1) A piston-cylinder device contains 0.3 kg of air initially at 1.8 MPa and 350°C. The air is first expanded isothermally to 500 kPa, then compressed polytropically (with a polytropic exponent of 1.2) to the initial pressure, and finally compressed at the constant pressure to the initial state. Determine the boundary work for each process and the net work of the cycle.

1) A piston-cylinder device contains 0.3 kg of air initially at 1.8 MPa and 350°C. The air is first expanded isothermally to 500 kPa, then compressed polytropically (with a polytropic exponent of 1.2) to the initial pressure, and finally compressed at the constant pressure to the initial state. Determine the boundary work for each process and the net work of the cycle.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1) A piston-cylinder device contains 0.3 kg of air initially at 1.8 MPa and
350°C. The air is first expanded isothermally to 500 kPa, then
compressed polytropically (with a polytropic exponent of 1.2) to the
initial pressure, and finally compressed at the constant pressure to the
initial state. Determine the boundary work for each process and the net
work of the cycle.

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