Three-tenths kmol of carbon monoxide (CO) in a piston- cylinder assembly undergoes a process from p1 = 150 kPa, T1 = 300 K to p2 =500 kPa, T2 = 370 K. For the process, W = -300 kJ.Employing the ideal gas model, determine:(a) the heat transfer, in kJ.(b) the change in entropy, in kJ/K.Part AEmploying the ideal gas model, determine the heat transfer, in kJ.kJSave for LaterAttempts: 0 of 1 usedSubmit AnswerPart BThe parts of this question must be completed in order. This part will be available when you complete the part above.

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Answered: Three-tenths kmol of carbon monoxide…

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

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An unknown ideal gas with a molecular mass of 32 kg/kgmol undergoes an isochoric process. The initial and final temperature of the tank is 220°C and 800°C, respectively. If the change in internal energy of the system is 170 KJ per kg of gas, determine the change in enthalpy, in KJ/kg and change in entropy, in KJ/kg-K. (Ans. 320.7 kJ/kg , 0.2779 kJ/kg-K)
One-quarter lbmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in2, T1 = 500oR to p2 = 150 lbf/in2. For the process W = -500 Btu and Q = -240.0 Btu. Assume the oxygen behaves as an ideal gas. Determine T2, in oR, and the change in entropy, in Btu/oR.
for steam, the specific ideal gas constant = 461.5 J/kg K A closed system is comprised of pure water substance initially at a temperature of 500 oC and a pressure of 20 MPa (state 1). The system undergoes an isochoric process whereby its pressure drops to 0.1 Mpa (state 2). Evaluate the specific entropy, specific volume and temperature of the system at state 2.
Air is expanded in an internally reversible process from p1=10.29 bar and T1=1200K to a final pressure of p2= 1.00 bar. Determine all properties of the initial and final states (T,p,v,h and u), calculate the work of the process per unit mass, and sketch the process in the T-s and p-v diagrams assuming ideal gas behavior in the 4 following cases. Adiabatic reversible expansion in an ideal turbine (1 inlet and 1 outlet); Adiabatic reversible expansion in a (closed) frictionless piston–cylinder device; Isothermal reversible expansion in an ideal turbine (1 inlet and 1 outlet); Isothermal expansion in a (closed) frictionless piston–cylinder device. Kinetic and potential energy terms are negligible in all processes
for steam, the specific ideal gas constant = 461.5 J/kg K A closed system is comprised of pure water substance initially at a temperature of 500 oC and a pressure of 20 MPa (state 1). The system undergoes an isochoric process whereby its pressure drops to 0.1 Mpa (state 2). Sketch the process on a Temperature-specific entropy plot, showing the lines of constant pressure which pass through steps 1 and 2.
during reversible process, 2.09 kg/s of gas rejects 322.9 kJ/s of heat isothermally at 25.5 degrees C. (for this gas, cp= 2.14 kJ/kg-K and cv= 1.62 kJ/kg-K). The initial pressure is 551.7 kPa. determine the work steady flow of the process if change in PE= 2.8 kJ/s and change in KE= 6.2 kJ/s
Determine the change in entropy of an ideal gas with constant heat capacity, CP=3.5R between the following States: P1= 1 bar, T1= 300k; V2= 0.025m³/mol;T2= 500k
Q1) Steam at 7 bar and dryness fraction 0.9 expands in a cylinder behind a piston isothermally and reversibly to a pressure of 1.5 bar. Calculate the change of internal energy (u2-u1) and the change of enthalpy (h2-h1) per kg of steam. (Answer: 217.5 kJ/kg and 245.7 kJ/kg ) Note : I don't understand how to interpolate to find u2(internal energy) and h2(enthalpy) . I have found u1= 2385.3 and h2= 2557.3 by using wet vapours formula and read values from saturated side.
Water vapor enters a turbine operating at steady state at 1000oF, 230 lbf/in2, with a volumetric flow rate of 25 ft3/s, and expands reversibly and adiabatically to 2 lbf/in2. Ignore kinetic and potential energy effects. determine the mass flow rate in lb/s and the power developed by the turbine in hp.
2 kg of air contained in a piston-cylinder assembly undergoes a process from the initial state of ?1 = 400?, ?1 = 0.5 ?3 to the final state of ?2 = 600?, ?2 = 0.8 ?3. Assume the ideal gas model with cv = 0.72 kJ/kg · K for the air. Kinetic and potential energy effects are negligible. a. Can this process occur adiabatically? Demonstrate it with formulas and calculations. b.If yes, determine the work, in kJ, for an adiabatic process between these states. If not, determine the direction of the heat transfer (in or out of the system). c.Determine the temperature of the isentropic process with the same initial state, ?1 = 400?, ?1 = 0.5 ?3, and the same final specific volume: ?2 = 0.8 ?3.
0.5 kmol of ideal gas (C̃ v ∗ = 1.5R) undergoes the following reversible changes in a series of nonflow processes: • From an initial state of 1 bar and 12m3 (state 1), it is compressed adiabatically to 3 bar (state 2), • It is then cooled at constant pressure to initial temperature (state 3), • Finally, it is compressed isothermally to 8 bar (state 4). a. Show all processes on a single P-V diagram. b. Calculate Q, W, and ∆U for each process and for the overall process
Air in a piston–cylinder assembly expands isentropically from T1 = 1800°R, p1 = 2000 lbf/in.2, to p2 = 20 lbf/in.2 Assuming the ideal gas model, determine the temperature at state 2, in °R, using (a) data from Table A-22E, and (b) a constant specific heat ratio, k = 1.4.

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