Question 1 A mass of 0.7 kg of air undergoes two reversible processes Process 1-2: Polytropic compression (PV1.456 =C) from T1 = 42°C and V1 = 0.3 m³ to T2 = 247°C and V2 = 0.1 m³. Process 2-3:...

Question 1<br>A mass of 0.7 kg of air undergoes two reversible processes<br>Process 1-2: Polytropic compression (PV1.456 =C) from T1 = 42°C and V1 = 0.3 m³ to T2 = 247°C and<br>V2 = 0.1 m³.<br>Process 2-3: Constant pressure expansion at P2 = P3 until V3 = V1.<br>Plot the processes on the P-v curve and determine for each process:<br>(a) the change in the entropy by using average specific heat.<br>(b) the change in the exergy.<br>(c) the useful work.<br>Take To= 25°C and Po= 100 KPa<br>in a piston-cylinder device as follow:<br>

Extracted text: Question 1 A mass of 0.7 kg of air undergoes two reversible processes Process 1-2: Polytropic compression (PV1.456 =C) from T1 = 42°C and V1 = 0.3 m³ to T2 = 247°C and V2 = 0.1 m³. Process 2-3: Constant pressure expansion at P2 = P3 until V3 = V1. Plot the processes on the P-v curve and determine for each process: (a) the change in the entropy by using average specific heat. (b) the change in the exergy. (c) the useful work. Take To= 25°C and Po= 100 KPa in a piston-cylinder device as follow:

Jun 11, 2022

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Question 1 A mass of 0.7 kg of air undergoes two reversible processes Process 1-2: Polytropic compression (PV1.456 =C) from T1 = 42°C and V1 = 0.3 m³ to T2 = 247°C and V2 = 0.1 m³. Process 2-3:...

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