3. A piston-cylinder assembly initially contains 3 kg of water at 75 kPa and pressure at 50 °C. Then the water is heated at constant pressure and the entropy of the water at the end of the process becomes 7.94 kJ / kgK. The entropy change during the process of water is: a. 24,81 kJ/K b. 21,71 kJ/K c. 14,86 kJ/K d. 16,2 kJ/K e. 7,23 kJ/K

3. A piston-cylinder assembly initially contains 3 kg of water at 75 kPa and pressure at 50 °C. Then the water is heated at constant pressure and the entropy of the water at the end of the process becomes 7.94 kJ / kgK. The entropy change during the process of water is: a. 24,81 kJ/K b. 21,71 kJ/K c. 14,86 kJ/K d. 16,2 kJ/K e. 7,23 kJ/K

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

None
2. 2 kg of water in a piston-cylinder assembly undergoes two consecutive reversible processes: a. Process 1-2: Isentropic compression from P1 = 0.1 MPa, T1=100°C to P2=D0.5 MPa b. Process 2-3: Isobaric process to a temperature T3 = 400 C Determine heat transfer (kJ), work (kJ), and change in specific entropy (kJ/kgK) for each process.
13. During a reversible process, 2.09 kg/s of gas rejects 322.9 kJ/s of heat isothermally at 25.5°C. For this gas, cp = 2.14 kJ/kg K and c, 1.62 kJ/kg K. The initial pressure is 551.7 kPa. Determine the work steady flow of the process in hp if APE = 2.8 kJ/s and AKE = 6.2 kJ/s.
Two kg water at 95°C with a quality of 40% has its temperature raised 15°C in a constant volume process. What is the new specific entropy? Select one: a. 3.618 kJ/kg K b. 4.015 kJ/kg K c. 6.747 kJ/kg K d. 5.232 kJ/kg K
2. A large slab of concrete, 5 × 8 × 0.3 m, is used as a thermal storage mass in a solar-heated house. If the slab cools overnight from 23 °C to 18 °C in an 18 ° C house, what is the net entropy change associated with this process? at jadi qmuq
please help with following problems: (a) Determine the heat exchanged between the piston/cylinder and the heatreservoir in kJ. Is heat added to the system or rejected to the heatreservoir? (b) Determine the change of entropy of the system in kJ/K. Is the resultreasonable? (c) Determine the entropy generation in kJ/K (change of entropy of thesystem+entropy change of the heat reservoir).
1
Quick please
Describe the Entropy and Entropy Generation in Daily Life
Q6: 1. Entropy generation is also used to establish criteria for the performance of engineering devices. Explain this point. 2. A well-insulated rigid tank contains 4 kg of a saturated liquid-vapor mixture of water at 250 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. 3. Refrigerant-134a at 1 MPa and 100 °C is throttled to a pressure of 0.8 MPa. Determine the reversible work and exergy destroyed during this throttling process. Assume the surroundings to be at 30 °C. 4. Explain Figure Q6-4 FIGURE Q6-4 Thermal efficiency of the ideal Diesel cycle as a function of compression and cutoff ratios (k-1.4). 0.6 0.3 0.4 0.3 0.2 0.1 r. -1 (Otto Typical compression ration leset 8 10 12 14 16 18 20 Compression ratio,
Where did you get the value of entropy for state 1?