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6. A piston-cylinder device initially contains 0.07 m³ of nitrogen gas at 130kPaa and 180°C. The nitrogen is now expanded to a pressure of 80kPaa polytropically with a polytropic exponent whose value is equal to the specific heat ratio. Determine the final temperature (C) and the boundary work (k) done during this process. Page | 93

6. A piston-cylinder device initially contains 0.07 m³ of nitrogen gas at 130kPaa and 180°C. The nitrogen is now expanded to a pressure of 80kPaa polytropically with a polytropic exponent whose value is equal to the specific heat ratio. Determine the final temperature (C) and the boundary work (k) done during this process. Page | 93

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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Answer #7. Draw a figure or graph that will support the problem. Explain each step by step formula.
6. A piston-cylinder device initially contains 0.07 m³ of nitrogen gas at 130kPaa and 180°C. The nitrogen is now expanded to a pressure of 80kPaa polytropically with a polytropic exponent whose value is equal to the specific heat ratio. Determine the final temperature (C) and the boundary work (k) done during this process. Page | 93 CHAРTER 5 PROCESSES OF IDEAL GAS 7. At a certain process, the specific heat at polytropic process of air is 0.3075kJ/kg- k. Under the same process, air initially at STP is being compressed until the pressure becomes 200kPaa. Determine the final temperature (°C) of air and the heat transferred during compression (kJ/kg).
Transcribed Image Text:6. A piston-cylinder device initially contains 0.07 m³ of nitrogen gas at 130kPaa and 180°C. The nitrogen is now expanded to a pressure of 80kPaa polytropically with a polytropic exponent whose value is equal to the specific heat ratio. Determine the final temperature (C) and the boundary work (k) done during this process. Page | 93 CHAРTER 5 PROCESSES OF IDEAL GAS 7. At a certain process, the specific heat at polytropic process of air is 0.3075kJ/kg- k. Under the same process, air initially at STP is being compressed until the pressure becomes 200kPaa. Determine the final temperature (°C) of air and the heat transferred during compression (kJ/kg).
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