3. Please consider a well-insulated compressor that was taking in an idealdiatomic gas at 1 atm and 25 °C at the rate of 1 mole/min. The compressorexhausted the gas at 7.5 atm. The First Law Thermodynamic Efficiencywas 74.1%. Please write and reducea. The Mass Balanceb. The Energy Balance for the Real Casec. The Energy Balance for the Ideal Cased. The Entropy Balance for the Real Casee. The Entropy Balance for Case

Answered: Image /qna-images/answer/1d719346-0354-40a8-842b-589b8130724e.jpg

Answered: 3. Please consider a well-insulated…

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 ideal gas at an initial state of 4.1, atm.38°C is expandedirreversibly to a final state of 2 atm, 4.4oCAssuming the specific heats of the gas to be C= 0.5150 and Cv= 0.3098 kJ/kg-°K calculate the change in entropy.
Ten kmol per hour of air is throttled from upstream conditions at 25°C and 10 bar to adownstream pressure of 1.2 bar. Assume air to be an ideal gas with Cp = (7/2)R 1. What is the downstream temperature? 2. What is the entropy change of the air in J/mol-K?
For dry saturated steam the value of specific entropy is equals to a. zero b. sg c. sf d. sfg
Steam enters a turbine at 70 bar, 500C, and leaves at 2 bar as a saturated vapor. Calculate the isentropic efficiency of the turbine. Assume adiabatic process and negligible changes in kinetic energy and potential energy.
a. One (1) kmol/h of air at 5 bar and 298K is adiabatically and reversibly compressed in a continuous process to 25 bar. What will the outlet temperature and power requirement be for the compressor in HP? (Cp = (7/2)R) b. Repeat the compression, but under steady state isothermal conditions. What will be the heat removal rate and power requirement for the compressor in HP?
QL 0.03m* of air s initially at 206°C and 7 bar is expanded at constant pressure to 0.09m? the followed by a polytropic process with index 1.5. Finally, a constant temperature process i carried out to complete the cycle. Determine: (a) Sketch the processes on P-V, T-V, and T-S diagrams. (b) The change in entropy during each process. (
An insulated, steady state piping system consists of flowing air that is combined from twopipes into a single outgoing pipe. Determine the temperature of the air at the exit, thediameter at the exit, and the rate of entropy production within the system. Assume: that air is an ideal gas (cp = 0.24 Btu/lb oR), that kinetic and potential energyeffects can be ignored, and the system is atmospheric pressure throughout.
Thermodyanamics (Ideal Gas) air enters an ideal nozzle at a pressure of 45 psig with a temperature of 1,340F. The pressure at the nozzle exit is 14.925 psia. Determine the increase of kinetic energy of 1lb of air produced by an isentropic expansion through nozzzle, Btu/lb?
A mechanical-draft cooling tower receives 115 m3 /sec of atmospheric air at 103 kPa, 32oC DB temperature, 55%RH and discharges the air saturated at 36oC. If the tower receives 200 kg/sec of water at 40oC, what will be the approach?
PROBLEM:One insulated rigid tank contains 1 kg of carbon dioxide CO2 at 3 bar and 150℃, while asecond one contains 0.5kg carbon dioxide at 1.5 bar and 50℃. A pipe and a closed valveconnect the two tanks. Once the valve opens, the gas achieves a new equilibrium state. Theheat transfer with the surroundings during this process is assumed negligible. Question:(a) Determine the final equilibrium temperature and pressure of the gas.(b) Determine the entropy change of the gas due to this process.
At the beginning of a cycle using air, the pressure, volume and temperature are 550 kN/m 2 , 0.025 m 3 and 15°C, respectively. The air is heatedat constant pressure until the temperature is 204°C. It is then expanded adiabatically until the temperature becomes 120°C. The air is cooled atconstant volume to a temperature of 15°C then restored to its original volume by isothermal compression. (a) Draw the pressure volume and temperature entropy diagram.(b) Determine for the cycle, the heat received,(c) the work done,(d) the thermal efficiency, Take Cp =1.00 kJ/kgK, Cp /Cv =1.4
Three kg of steam has an initial enthalpy of 7200 kJ at 0.145 MPa. Isentropic compression gives a final pressure of 0.29 MPa. Find (a) the initial and final temperatures and (b) the work of a steady and nonflow processes. Ans. (a) 110.4°C, 132.4°C; (c) –288.5 kJ, –325.8 kJ.

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