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A certain gas is contained within a piston cylinder assembly undergoes a process which is PV1.5 = constant. The initial volume is 0.50 m³/kg, the final pressure is 3.0 bar and the final volume is 0.25 m³/kg. The change in specific energy of the gas in the process is [u2 – u1] = 55 kJ/kg and the absolute magnitude of the work done is 44 kJ/kg.

A certain gas is contained within a piston cylinder assembly undergoes a process which is PV1.5 = constant. The initial volume is 0.50 m³/kg, the final pressure is 3.0 bar and the final volume is 0.25 m³/kg. The change in specific energy of the gas in the process is [u2 – u1] = 55 kJ/kg and the absolute magnitude of the work done is 44 kJ/kg.

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
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Include simple schematic , process digram , and assumption

Example 2.2 Cooling of a Gas in a Piston Cylinder A certain gas is contained within a piston cylinder assembly undergoes a process which is PV1.5 = constant. The initial volume is 0.50 m³/kg, the final is 3.0 bar and the final volume is 0.25 m³/kg. The change in specific energy of the gas in the process is [u2 – u1] = 55 kJ/kg and the absolute magnitude of the work done is 44 kJ/kg. pressure Schematic: Process Diagram: Assume: | 1. The initial pressure P1 in kPa is а. 1.06 b. 10.6 с. 106 d. cannot be determined. 2. The heat transfer 1q2 for the process in kJ/kg is а. -11.0 b. 0.0 с. 11.0 d. cannot be determined. 3. The work 1w2 for an isobaric process at P2 between the same end states in kJ/kg is а. -75 b. -44 с. -30 d. cannot be determined. 4. The work 1W2 for the original process with m = 0.4 kg in kJ is а. -30.0 b. -20.8 с. -17.6 d. cannot be determined. 5. The heat transfer 1Q2 for the original process with m = 0.4 kg in kJ is а. +4.4 b. -4.4 с. -11.0 d. cannot be determined.
Transcribed Image Text:Example 2.2 Cooling of a Gas in a Piston Cylinder A certain gas is contained within a piston cylinder assembly undergoes a process which is PV1.5 = constant. The initial volume is 0.50 m³/kg, the final is 3.0 bar and the final volume is 0.25 m³/kg. The change in specific energy of the gas in the process is [u2 – u1] = 55 kJ/kg and the absolute magnitude of the work done is 44 kJ/kg. pressure Schematic: Process Diagram: Assume: | 1. The initial pressure P1 in kPa is а. 1.06 b. 10.6 с. 106 d. cannot be determined. 2. The heat transfer 1q2 for the process in kJ/kg is а. -11.0 b. 0.0 с. 11.0 d. cannot be determined. 3. The work 1w2 for an isobaric process at P2 between the same end states in kJ/kg is а. -75 b. -44 с. -30 d. cannot be determined. 4. The work 1W2 for the original process with m = 0.4 kg in kJ is а. -30.0 b. -20.8 с. -17.6 d. cannot be determined. 5. The heat transfer 1Q2 for the original process with m = 0.4 kg in kJ is а. +4.4 b. -4.4 с. -11.0 d. cannot be determined.
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