A piston cylinder assembly contains 19kg of water that executes four processes in series: • Process 1->2: Constant pressure cooling from P1=20bar and T1=360°C to saturated vapor • Process 2-->3: Constant volume cooling to P3=5bar Process 3->4: Constant pressure heating to v4=0.5644m3/kg • Process 4->5: Polytropic process following Pv =constant until P5=20bar A. Considering the water as the system, is the system best described as open, closed, or isolated? WHY? B. Sketch the series of processes on PT, Pv, and Tv diagrams. Include values on the P, T, and v axes. Indicate states with fille dots, processes with solid lines, and directions with arrows. C. Does this complete series of processes represent a thermodynamics cycle? EXPLAIN your reasoning. Answer parts A and C in the box below; upload part B as part of your response PDF.

Initially contains Air: P1 = 30 lbf/in^2 T1 = 540 °F V1 = 4 ft^3 Second phase of process involving Air to a final state: P2 = 20 lbf/in^2 V2 = 4.5 ft^3 Wheel transfers energy TO the air by WORK at 1 Btu. Energy transfers TO the air by HEAT at 12 Btu. Ideal Gas Behavior. Determine energy transfer by work based on the air to the piston in Btu. Wpw =-1 Btu Ima Q = -12 Btu Air Wpist = ? Initially, p₁ = 30 lbf/in.², T₁ = 540°F, V₁ = 4 ft³. Finally, p2 = 20 lbf/in.², V₂ = 4.5 ft³.

A gas contained within a piston–cylinder assembly undergoes a thermodynamic cycle consisting of three processes:Process 1–2: Compression with pV = constant from p1 = 1 bar, V1 = 1.0 m³ to V2 = 0.2 m³Process 2–3: Constant-pressure expansion to V3 = 1.0 m³Process 3–1: Constant volumeSketch the cycle on a p–V diagram labeled with pressure and volume values at each numbered state.

Initially contains Air: P1 = 30 lbf/in^2 T1 = 540 °F V1 = 4 ft^3 Second phase of process involving Air to a final state: P2 = 20 lbf/in^2 V2 = 4.5 ft^3 Wheel transfers energy TO the air by WORK at 1 Btu. Energy transfers TO the air by HEAT at 12 Btu. Ideal Gas Behavior. Wpw =-1 Btu Ima Determine whether the propeller's work is done BY the system or On the system. Q = -12 Btu Air Wpist = ? Initially, p₁ = 30 lbf/in.², T₁ = 540°F, V₁ = 4 ft³. Finally, p2 = 20 lbf/in.², V₂ = 4.5 ft³.

8. thermodynamics

Derive the seven general property equation of the following thermodynamics processes: a. POLYTROPIC PROCESS

Water contained in a piston-cylinder assembly undergoes two processes in series (point 1 to point 2 and point 2 to point 3): point 1: T1 = 100°C and P1 = 5bar point 2: 71= 151.9°C and P2 = 5bar and v2 = 0.300 .300 m³ point 3: 73= 200°C and v3 = .300" kg Use the thermodynamic tables A.2, A.3, and A.4 to answer the following questions: For questions 1, 3, and 5 choose from: subcooled water, saturated water, saturated liquid, saturated vapor, superheated vapor 1) What is the thermodynamic state of water at point 1: 2- What is the specific volume of water at point 1: 3) What is the thermodynamic state of water at point 2: 4) What is the quality of water (x) at point 2: 3) What is the thermodynamic state of water at point 3: 4) What is the pressure of water at point 3: (bar) On paper draw points 1, 2, and 3 on the following P-v and T-v diagrams and show the two processes. Add number values, units, and constant pressure or temperature lines if needed. Specify which table you used to find…

3. 4.50 mol of N2 gas (Cym = 20.6 J mol K') is enclosed in a piston-cylinder assembly (closed system) and undergoes the cycle depicted graphically below. Assuming N2 behaves as an ideal gas and Cm is temperature independent over the given temperature range, calculate q, w, AU, and AH for each segment. Label each segment with the type of process. Note: segment 2→3 follows the relationship PV = nRT . 1.) 20.0 L 2.) 50.0 L 3.) 5.00 bar T= T; = T, V (L) P (bar)

** I mainly just need help with process 4-1. I do not remember PV constants well.

Thermodynamics