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A piston-cylinder device contains 0.13 kg of air initially at 2 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. The properties of air are R = 0.287 kJ/kg-K and k=1.4. The boundary work for the isothermal expansion process is The boundary work for the polytropic compression process is kJ. kJ. The boundary work for the constant pressure compression process is The net work for the cycle is kJ. kJ.

A piston-cylinder device contains 0.13 kg of air initially at 2 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. The properties of air are R = 0.287 kJ/kg-K and k=1.4. The boundary work for the isothermal expansion process is The boundary work for the polytropic compression process is kJ. kJ. The boundary work for the constant pressure compression process is The net work for the cycle is kJ. kJ.

Elements Of Electromagnetics
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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A piston-cylinder device contains 0.13 kg of air initially at 2 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. The properties of air are R = 0.287 kJ/kg-K and k = 1.4. The boundary work for the isothermal expansion process is The boundary work for the polytropic compression process is The boundary work for the constant pressure compression process is The net work for the cycle is kJ. kJ. KJ. kJ.
Transcribed Image Text:A piston-cylinder device contains 0.13 kg of air initially at 2 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. The properties of air are R = 0.287 kJ/kg-K and k = 1.4. The boundary work for the isothermal expansion process is The boundary work for the polytropic compression process is The boundary work for the constant pressure compression process is The net work for the cycle is kJ. kJ. KJ. kJ.
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