Problem 5 A closed piston/cylinder device contains 0.2 kg of air initially at 300 K and 100 kPa. The air is now slowly compressed in an isothermal process to a final pressure of 250 kPa. Assume the air is an ideal gas with constant specific heat: Cp= 1.004 kJ/kg-K, Cv= 0.717 kJ/kg-K. The molecular weight for air is 29 kg/kmol. Draw a schematic and list the necessary assumptions. Determine the volume in m³ of the air at the initial state. Determine the temperature and volume of the air at the final state. Determine the work in kJ during the process. Is the work done by the air or on the air? Determine the heat transfer in kJ during the process. Is a heat input or output?

Problem 5 A closed piston/cylinder device contains 0.2 kg of air initially at 300 K and 100 kPa. The air is now slowly compressed in an isothermal process to a final pressure of 250 kPa. Assume the air is an ideal gas with constant specific heat: Cp= 1.004 kJ/kg-K, Cv= 0.717 kJ/kg-K. The molecular weight for air is 29 kg/kmol. Draw a schematic and list the necessary assumptions. Determine the volume in m³ of the air at the initial state. Determine the temperature and volume of the air at the final state. Determine the work in kJ during the process. Is the work done by the air or on the air? Determine the heat transfer in kJ during the process. Is a heat input or output?

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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