A frictionless piston cylinder device contains air as shown in Figure Q1. The piston initially rests on a set of stops, and a pressure of 600 kPa is required to move the piston. Initially, the air is at 500 kPa and 70°C and occupies a volume of 0.2 m³. Heat is transferred to the system and the pressure of the system increases until the piston starts to rise from the stops. The piston is free to move while maintaining a constant pressure on the system. Heat is further transferred until the temperature reaches 200°C. Assume air as an ideal gas and the piston cylinder device is stationary. The R and c, of air are 0.287 kJ/kg.K and 1.005 kJ/kg.K respectively. i) Determine the mass of the air inside the piston cylinder device (kg). ii) Determine the total work done for the above processes (kJ). iii) Determine the total heat transferred for the above processes (kJ). iv) Sketch the above processes on a pressure versus specific volume (P-v) diagram. Air Figure QI
A frictionless piston cylinder device contains air as shown in Figure Q1. The piston initially rests on a set of stops, and a pressure of 600 kPa is required to move the piston. Initially, the air is at 500 kPa and 70°C and occupies a volume of 0.2 m³. Heat is transferred to the system and the pressure of the system increases until the piston starts to rise from the stops. The piston is free to move while maintaining a constant pressure on the system. Heat is further transferred until the temperature reaches 200°C. Assume air as an ideal gas and the piston cylinder device is stationary. The R and c, of air are 0.287 kJ/kg.K and 1.005 kJ/kg.K respectively.
i) Determine the mass of the air inside the piston cylinder device (kg).
ii) Determine the total work done for the above processes (kJ).
iii) Determine the total heat transferred for the above processes (kJ).
iv) Sketch the above processes on a pressure versus specific volume (P-v) diagram. Air Figure QI
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