A piston cylinder device shown in Figure P2.6 contains 0.1 kg of air initially at a pressure of 4 MPa and temperature of 2000 C. Heat is added to the system until the pressure is 8 MPa and the temperature is 8000 C. Sketch the process on P-V and T-V diagrams and determine the total work transfer. [Take R = 287 J/kg K]

2. A piston-cylinder assembly with stops (see figure) contains 1.54 kg of water initially occupying a volume of 1.25 m at a pressure of 1 bar (State 1). As the water in the assembly is heated, the pressure and temperature in the system remain constant until the piston contacts the stops. In this position (State 2), the quality, x2, is determined to be 92%. Heat continues to be added to the system at a constant volume until the system reaches a pressure of 1.5 bar (State 3). Determine the following quantities: а. X b. V2 (m2) C. W13 (kJ) d. Qu (kJ) e. Plot the results on a P-v diagram, labelling relevant P, T, and v values.

Please assist with part b!

In the piston-cylinder system shown in the figure, the piston rises up to (3) position. Choosing one of the 3 options given in the table, a) the pressure and temperature in positions (2, 3), b) Show the process change (1-2, 2-3) on the P-v diagram by drawing the saturation actions, c) find the total limit work and spring work, d) Find the heat transferred.