Air is compressed from 120 kPa and 350 K to 1200 kPa and 750 K.a) Calculate the change in specific entropy As of the air using constant specific heat capacitiesat 550 K and equations based on cp, Cv, and the heat capacity ratio k.b) Calculate the change in specific entropy As of the air using equations and table values(A-17), which account for the changes in heat capacities with temperature.c) What will the temperature at the end of the compression process T2, be, if the pressure aftercompression is 1200 kPa, the compression process is isentropic, and you use constant specificheat capacities at 550 K and equations based on Cp, Cv, and the heat capacity ratio k.d) What will the temperature at the end of the compression process T2, be, if the pressure aftercompression is 1200 kPa, the compression process is isentropic, and you account for changesin heat capacities with temperature by using corresponding equations and table values?e) Calculate the deviation between the results for As and T₂ in %

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Answered: Air is compressed from 120 kPa and 350…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Provide a complete solution and answer for the given problem in the attached image.
Steam to a turbine at a mass flow rate of 1.4 kg/s, 700 kPa pressure and 400 °C enters the temperature. Steam at 100 kPa pressure and 1.4 m3/kg specific volume exits the turbine. Heat transfer from turbine to environment 50 kW, with turbine Since the boundary temperature between the environment is 70 °C, a) Find the power produced by the turbine, entropy produced in the turbine and isentropic efficiency of the turbine. Note: The changes in kinetic and potential energies will be neglected and T (K) = 273 + °C will be taken.
occuring when a process with air, the entropy goes up by 0.60 kJ/kg·K. 11 is the pressure compression ratio. 300K is the initial temperature. What is the final temperature if it is a constant specific heat and if it is a variable specific heat? When Rair = 0.287 and cp = 1.005 kJ/kg·K.
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Problem 8 Calculate the change in the entropies of the system (AS.99) and the surroundings (ASsur), and the total entropy change (ASotal) when a sample of 1.0 mol of an ideal gas at 300 K and 1.0 bar triples its volume in: a) isothermal reversible expansion b) isothermal expansion against a vacuum (Psurr = 0) c) Will the process in (a) occur spontaneously? What about the process in (b)? Why or why not? %3D
3. An adiabatic compressor takes argon from 100 kPa, 300 K to 2000 kPa. The compressor efficiency is 80%. (a) Find the outlet temperature (K) and the work (kJ/kg) (b) Find the entropy generation (kJ/kg-K)
Q10) One kg of an ideal gas is compressed isothermally at 400K from 100 kPa to 1000kPa in a piston cylinder arrange, calculate the entropy change of the gas, the entropy change of the surroundings and the total change in entropy if, a- the process is mechanically reversible b- the process is reversible and the surroundings consist of heat sink at 300K ,c- the process is mechanically irreversible requiring 20% more work than the mechanically reversible compression and the surroundings consist of heat sink reservoir at 300K. Take R=0.287.
ESL-2 150 grams of water at 20.0°C in a pan is places in an oven that is at a constant 100.0°C. a) Starting with AS-dQr/T, clearly explain all steps – evaluating the integral and finding the mumerical value - to find the total change in entropy for the original H20 to go from 20.0°C to become steam at 100.0°C. b) Starting with AS-dQr/T, clearly explain all steps- evaluating the integral and finding the numerid value to find the change in entropy for the oven interior for this entire process. c) Find the total change in entropy for the universe for this entire process. (Neglect the change due to the warming of the pan). Use this answer to explain whether this process is reversible or irreversible.
B1
Thermodynamics: Please show me how to solve the given practice problems in step by step solution.
Number 4
2. If 0.17 kg/s of air are compressed isothermally from Pi = 96 kPaa and V, = 0.13 m/s to p2 = 620 kPaa, find the work, the change of entropy, and heat for: a) a nonflow process, and b) a steady flow process with V1 = 15 m/s and V2 = 60 %3D %3D m/s.

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