Question

Patm 100 kPa 1 kg of water is contained in a frictionless piston cylinder device fitted with two stops. The mass of the piston is 50 kg and the system is open to the atmosphere with Ptm - 100 kPa. The initial temperature of the system Ti Tantal 105 'C and the initial volume V1 Vinitial 1 m3 When the piston reaches the second stop, the volume of the water is doubled (V4Vinal2 Vinitial). Heat is EE transferred between the system and the surroundings so that the final pressure P Pinal 150 kPa. The area of the cylinder is 0.02 m2 mE50 kg Find: 1- The initial pressure and the initial internal energy. 2- The minimum pressure required to lift up the piston. 3- The initial position of the piston (resting on the stop or in between the stops or hitting the second stop). Area -0.02 m2 of the system with the phase of water at each state and the process path between each state. 5 Calculate the amount of heat exchanged by the system and its direction. 6- Sketch the processes and the states on a T-v diagram.

Answer 1