Chapter 7, Problem 7.19P

Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. n = i eTextbook and Media Save for Later 4.5 P (bar) % 1.2 Assuming ideal gas behavior for the air, evaluate the thermal efficiency of the cycle. 3 1.0 v (m³/kg) Isothermal process 3.75 Attempts: 0 of 5 used Submit Answer

Topic: Ideal gas process Instructions: Answer the following review questions and show complete solutions. *please write legibly. Thank you

3.55-A system consisting of 1 kg of H,O undergoes a power cycle composed of the following processes: Process 1-2: Constant-pressure heating at 10 bar from saturated vapor. Process 2-3: Constant-volume cooling to P3 = 5 bar, %3D T3 = 160°C. Process 3-4: Isothermal compression with Q34 = -815.8 kJ. %3D Process 4–1: Constant-volume heating. Sketch the cycle on T-v and p-v diagrams. Neglecting kinetic and potential energy effects, determine the thermal efficiency.

Determine the power requirement (in kW) of the compressor if 5 mol/s of the gas flows through it

Solve correctly please.

Question #2 For the following processes, find the changes in h  as appropriate. The initial state pressure is p1 = 0.5 MPa. the final state is 2.   a.  constant volume :                   v1 = 0.3 m3/kg,            p2 = 0.3 MPa; b. constant entropy :                    s1 = 6.3 kJ/kg K,        p2 = 0.15 MPa; c. constant volume :                    h1 = 2500 kJ/kg,          p2 = 0.2 MPa; d. constant enthalpy :                 s1 = 6.4 kJ/kg K,        p2 = 0.2 MPa;

1. Which of the following seven variables are extensive? Which ones are intensive variables? M, V, T, P, N, p, and V 2. ( closed ) According to state principle, which of the following properties is fixed for liquid water in a system at 25°C and 1 atm (i.e., single-phase and single component)? Select all correct answers. A. The water's molar volume B. The water's specific volume C. The water's total volume D. The water's density According to state principle, which of the following properties is fixed for 100 g liquid water in a closed system at 25°C and 1 atm (i.e., single-phase and single component)? Select all correct answers. L ft A. The water's molar volume B. The water's specific volume C. The water's total volume D. The water's density 3. ( ) Water flows into the top of an open barrel at a constant mass flow rate of 30 lb/s. Water exits through a pipe near the base with a mass flow rate proportional to the height of water inside: M₁ =9L, where L is the instantaneous water height,…

Give typed full explanation

Twenty pounds of air initially at 1560°R, 3 atm fills a rigid tank. The air is cooled to 1040°R, 2 atm. For the air modeled as an ideal gas: a) Indicate the initial state, final state, and dead state on a T-v diagram b) Determine the heat transfer, in Btu c) Determine the change in exergy, in Btu, and interpret the sign using the T-v diagram of part (a) Let To = 520°R, Po = 1 atm and ignore the effects of motion and gravity.