2.42 A gas undergoes a thermodynamic cycle consistinof the following processes:Process 1-2: constant pressure, p= 1.4 bars, V₁ =0.028 m³, W12 10.5 kJProcess 2-3:compression with pV = constant, U3 =U₂Process 3-1:constant volume, U₁U3 = -26.4 kJThere are no significant changes in kinetic or potentialenergy.(a) Sketch the cycle on a p-V diagram.(b) Calculate the net work for the cycle, in kJ.(c) Calculate the heat transfer for process 1-2, in kJ.

Introduction In this problem, we have three processes namely the constant pressure process (isobaric…

2.42 A gas undergoes a thermodynamic cycle consisun of the following processes: Process 1-2: constant pressure, p= 1.4 bars, V₁ = 0.028 m³. W12 10.5 kJ Process 2-3: compression with pV = constant, U₁= U₂ Process 3-1: constant volume, U₁ - U₁ = -26.4 kJ There are no significant changes in kinetic or potential energy. (a) Sketch the cycle on a p-V diagram. (b) Calculate the net work for the cycle, in kJ. (e) Calculate the heat transfer for process 1-2, in kJ.

2.42 A gas undergoes a thermodynamic cycle consisun of the following processes: Process 1-2: constant pressure, p= 1.4 bars, V₁ = 0.028 m³. W12 10.5 kJ Process 2-3: compression with pV = constant, U₁= U₂ Process 3-1: constant volume, U₁ - U₁ = -26.4 kJ There are no significant changes in kinetic or potential energy. (a) Sketch the cycle on a p-V diagram. (b) Calculate the net work for the cycle, in kJ. (e) Calculate the heat transfer for process 1-2, in kJ.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

The molar heat capacities of substances varies with temperature. The general function for determining the molar heat capacity is given below; Cp = ( a + b T + c T 2 )R . In case of a gas where a = 3.245, b = 7.108 x10 ^-4 K ^-1 , and c = -4.06 x10^ -8 K ^-2 for temperatures in the range of 300 Kelvins to 1,500 Kelvins. What is the heat capacity (in Joules per Kelvin per mole) of this gas at 1,500 kelvins? NOTE: Express answer in THREE SIGNIFICANT FIGURES.
b- Water in a chamber within which piston moves maintaining constant pressure at 330 F, quality 85% with a volume of 0.12 m³. A heater is turned on heating the water with 3 kw. What is the elapsed time to vaporize all the liquid? h= 887,5 Btu/lbm ,vF0.01776 ft’/lbm „Vg=4.29ft/lbm
within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of A gas three processes: Process 1-2: Constant volume, V = 0.06 m², U2 - U, = 40.4 kJ Process 2-3: Expansion with PV = constant, U3 - U2= 0 Process 3-1: Constant pressure, P =3 bar, W31 = (-20) kJ There are no significant changes in kinetic or potential energy. %3D Identify the process on a sketch of p-V diagram plotted for the cycle. Formulate the expression for heat transfer for process 2-3 and process 3-1. (Hint: Apply first law of thermodynamics for closed systems) (a) (b) (c) Solve to find the net-work for the cycle and heat transfer for the process 2-3 and Heat transfer for process 3-1, in kJ Identify if the above system executes a power cycle or a refrigeration cycle. Give (d) reason.
Gas supply line- Gas A 2.1 m3 tank initially contains a gas at 170 kPa, 370 K. The tank is connected a line carrying same gas at 1700 kPa and 370 K. What should be heat transfer during this process, in kJ, so that the final pressure and temperature are 1700 kPa and 370 K, respectively. (cp=D0.92 kJ/kg.K, c=0.64 kJ/kg.K).
An oxygen gas R = 0.2598 KJ/kg°k and k = 1.395. If 4 kg of oxygen undergo a reversible non flow constant pressure process from initial volume =1.2 cubic meter and initial pressure = 690 kPa to a state where final temperature = 600°C. 1. Determine the Change in Internal Energy. choices: a.200.60 KJ. b.198.45 KJ. c.99.54 KJ. d.200.55 KJ 2. Determine the constant pressure-specific heat. choices: a.0.9865 KJ/kg-°K. b.0.9175 KJ/kg-°K. c.0.8580 KJ/Kg-°K. d.0.7843 KJ/kg-°K need complete solution, cancellation and symbol:)
5. (Pp133p-ex4.4-jrfra) - A closed system executes a series of processes for which two of the three quantities, W, Q, and AU are given for each process. Find the value of the unknown quantity in each case. a) W = 10 Hp, Q = 500 Btu/min, AU = ? b) W = ?, Q = 5 Btu, AU = 4.22 kJ c) W = 65 Btu, Q = ?, AU = -25 Btu d) W = 1,200, Q = 645 kJ e) W = -389 ft-lb, Q = -1.5 Btu, AU = ?
A turbine operating under steady-flow conditions receives steam at the following state; pssure,100 bar; specific internal energy 2773 kJ/kg, velocity 30 m/s. the state of steam leaving the turbine is as follow: pressure 1 bar, specific internal energy 2450 kJ/kg, velocity 90 m/s. Heat is rejected to the surroundings at the rate of 0.25 kW and the rate of steam flow through the turbine is 0.4 kg/s calculate the power developed by the .turbine
awuIs 2 kg of air undergoes a power cycle undergocs a power cycle consisting of the following processes: Process 1-2: Constant-temperature expansion from p, = 4 bar, v, = 1 m³ /kg, to p2 = 2 bar, v2 = 2 m3/kg. Process 2-3: Constant-pressure compression to T3 = 696.9 K. Process 3-1: Constant-volume heating to state 1. Assume ideal gas behavior and neglect kinetic and potential energy effects. Show that T; = 1393.7 K and find T Sketch the cycle on a T-v diagram and label the states. Find the work done and heat transferred during cach process to complete this chart: b C. Process W (kJ) Q (kJ) iti 1-2 2-3 3-1 TOTAL Find the thermal efficiency of the cycle. For an energy balance on the entire cycle (1-2-3-1), what should the change in system energy be? Does that hold in this case? Add a Caption Pedro Castaño shared with you > Wednesday • Feb 23, 2022•7:24 PM Adjust IMG_7188 Apple iPhone 12 Pro Max НEIF Wide Camera – 26 mm f1.6 3 MP • 1914 × 1728 • 3.5 MB i
Water undergoes two processes in series: • 1 to 2: isentropic (internally reversible and adiabatic) compression from 0.1 MPa and the phase of water is “saturated vapor” to 0.5 MPa• 2 to 3: a reversible isothermal process to 1.5 MPaa) Draw the overall process on a T-s diagram. Clearly indicate all states and the values of the relevant intensive properties on your diagram. b) Is process 2 to 3 a compression, expansion, or isochoric process? How do you know? c) Determine the overall specific work (w13) and specific heat transfer (q13) for this complete process. (Hint: recall that Q int rev =∫ T ds21 for an internally reversible process between states 1 and 2.)
A turbine operating under steady-flow condition receives steam at the following state: pressure,13.8bar; specific volume 0143 m3 /kg, and velocity 30m/s. The state of the steam leaving the turbine is as follow: pressure 0.35 bar, specific volume 4.37 m3/kg and velocity 90 m/s. The difference in elevation is negligible. Heat is rejected to the surrounding at the rate of 0.25 kW, the turbine develops 103kW of power and the rate of steam flow through the turbine is 0.5 kg/s. Calculate the change in internal energy of the steam
Air is compressed in a piston–cylinder assembly from p1 = 25 lbf/in2, T1 = 500°R, V1 = 9 ft3 to a final volume of V2 = 1 ft3 in a process described by p⁢v1.30=constant. Assume ideal gas behavior and neglect kinetic and potential energy effects. Using constant specific heats evaluated at T1, determine the work and the heat transfer, in Btu.
X Your answer is incorrect. A rigid tank whose volume is 4 m³, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only as long as required to fill the tank with air to a pressure of 6 bar and a temperature of 350 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. Qev = i 88.08 eTextbook and Media Hint Save for Later kJ Attempts: unlimited 4 Submit Answer