1. A gas contained within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes between three equilibrium states (1, 2, and 3): O Process A from state 1 to state 2: Compression with (pV=constant) from (p1 =1 bar, V1 = 1.0 m) to V2 = 0.2 m3 Process B from state 2 to state 3: Constant-pressure expansion to V3 = 1.0 m3 Process "C" from state 3 to state 1: Constant volume . Sketch the cycle on a p-V diagram labeled with pressure and volume values at each numbered state. 2. Air contained within a vertical piston-cylinder assembly is shown below. On its top, the 10-kg piston is attached to a spring and exposed to an atmospheric pressure of 1 bar. Initially, the bottom of the piston is at x = 0, and the spring exerts a negligible force on the piston. The valve is opened and air enters the cylinder from the supply line, causing the volume of the air within the cylinder to increase by 0.00039 m. Patm Air supply line Valve Air The force exerted by the spring as the air expands within the cylinder varies linearly with x according to [F spring = k x], where k = 10,000 N/m. The piston face area is *= 0 0.0078 m. Ignoring friction between the piston and the cylinder wall, determine the pressure of the air within the cylinder, in bar, when the piston is in its initial position. Repeat when the piston is in its final position. Take g= 9.81 m/s? (Answers: 1.126 bar, 1.767 bar) 3. Complete the following table for refrigerant-134a (R-134a); and show the details of any required calculations or logic explanations: P (kPa) Phase Description T(C) 20 -12 u (kJ/kg) 95 No. A B D E Saturated liquid 300 8 0 400 600 293 4. A piston-cylinder device, fitted with a freely moving frictionless piston, contains 0.1 m? of liquid water and 0.9 m of water vapor in equilibrium at 800 kPa. Heat is transferred until the temperature reaches 350C