An insulated free-moving piston-cylinder device contains 0.5L ofsaturated liquid water at a constant pressure of 100 kPa. An electricresistance heater inside the cylinder is now turned on, and 1178.36 kJ ofelectrical work is transferred to the steam. Determine (a) the entropychange of the water during this process; (b) the entropy generation duringthis process?1178.36 kl

Answered: Image /qna-images/answer/915016cb-d920-4180-b9ff-a56827d936bb.jpg

Answered: An insulated free-moving…

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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A well-insulated rigid tank contains 3.5 kg of a saturated liquid-vapor mixture of water at 200 kPa. Initially, three-quarters of the mass is in the liquid phase. An electric resistance heater placed in the tank is now turned on and kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this process. Use steam tables. H₂O 200 kPa We The entropy change of the steam during this process is kJ/K.
As a result of heat transfer to the surroundings during a constant-pressure process, 0.375 kg of steam ina frictionless piston-cylinder assembly experiences a decrease in entropy of 2.75 kJ/kgK. The initialtemperature and pressure of the steam are 700 C and 1.6 MPa, respectively, and the process isinternally reversible. Calculate the work and the heat transfer for this process and the total entropychange (Tsur. = 27 C).
A process innovated by Engr. Santioque is considered to be in a constant pressure. If there is tenkilograms of air has a decrease of internal energy of 35 BTU while its Fahrenheit temperature is reduced to one half of the initial temperature during a reversible non flow process. Determine (a) the initial and final temperatures, (b) heat, (c) work, and (d) the change in entropy.
Air is compressed in a cylinder during a non-flow reversible polytropic process from an initialtemperature and pressure of 60°F and 12psia to a final temperature and pressure of 295°F and80psia. If the cylinder contains 0.04 lbm of air, find: a. The value of polytropic exponent (n)b. The work done, in BTUc. The change in enthalpy, in BTUd. The heat transferred, BTU
A piston–cylinder device initially contains 15 ft3 ofhelium gas at 25 psia and 70F. Helium is now compressed ina polytropic process (PVn = constant) to 70 psia and 3008F.Determine (a) the entropy change of helium, (b) the entropychange of the surroundings, and (c) whether this process isreversible, irreversible, or impossible. Assume the surroundingsare at 70F.
A 0.5-m³ rigid tank contains refrigerant-134a initially at 250 kPa and 45 percent quality. Heat is transferred now to the refrigerant from a source at 35°C until the pressure rises to 450 kPa. Determine: a. The entropy change of the refrigerant. b. The entropy change of the heat source. C. The total entropy change for this process. Using EES software, investigate the effect of the source temperature and final pressure on the total entropy change for the process. Let the source temperature vary from 30°C to 210°C, and the final pressure vary from 300 to 500kPa. Plot the total entropy change for the process as a function of the source temperature for final pressures of 300 kPa, 400 kPa, and 500 kPa, and discuss the results.
A piston-cylinder device initially contains 5 Ibm of liquid water at 20 psia and 70°F. The water is now heated at constant pressure by the addition of 5910.6 Btu of heat. Determine the entropy change of the water during this process.in psi. Select one: a. 6.330 Btu/R b. 8.712 Btu/R c. 5.105 Btu/R d. 7.821 Btu/R
What is entropy and its application?
A 4-kg steel rod 873°C (specific heat= 0.85kJ/kg-K) is annealed in a cylindrical tank 3B0 kg of water originally at 20°C during a heat-treating process. What is the closest approximation to the overall entropy change of the system after annealing?
Thermodynamics
H.W: (1) An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 KPa. An electrical resistance heater inside the piston is turned on now and electrical work done on steam is 2200 W. Find: (a) initial and final temperature of water (T1 and T2), (b) the work done during this process (W1-2 ), (c) the entropy change of water and show if the process is possible or not, and (d) plot P-V and T- s diagrams.
Steam at 173.46°C and with a specific entropy of 6 kJ/kgK undergoes a polytropic process with n -1.18 until the pressure becomes 2 MPa. What is the final temperature of the steam, the work and heat in kj/kg?

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