Question

Can you please help me with these 5 problems!!! please and thank you

Question 1

A mass of 5 kilograms of carbon dioxide (CO₂) in a piston-cylinder assembly undergoes two processes in series from an initial state where p₁ = 2.4 MPa, T₁ = 260°C:

Process 1–2: Constant-temperature expansion until the volume is twice the initial volume.

Process 2–3: Constant-volume heating until the pressure is again 2.4 MPa.

Assuming ideal gas behavior, determine the overall work, in kJ.

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Nitrogen (N₂) contained in a piston–cylinder arrangement, initially at 6 bar and 435 K, undergoes an expansion to a final temperature of 300 K, during which the pressure–volume relationship is pV^1.5 = constant. Assuming the ideal gas model for the N₂, determine the heat transfer in kJ/kg.

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A piston–cylinder assembly contains air, initially at 3.7 bar, 163 K, and a volume of 2 m³. The air undergoes a process to a state where the pressure is 1.5 bar, during which the pressure–volume relationship is pV = constant. Assuming ideal gas behavior for the air, determine the mass in kg.

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Question 4

Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 292°C from a pressure of 8.9 bar to a pressure of 3.7 bar. Evaluate the work, in kJ/kg.

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Question 5

Argon contained in a closed, rigid tank, initially at 38.1°C, 2 bar, and a volume of 1.2 m³, is heated to a final pressure of 7.3 bar. Assuming the ideal gas model with k = 1.65 for the argon, determine the heat transfer, in kJ.

Answer 1

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