Please do not use the answers to calculate the answer, Find the answer the normal way. What is the entropy change of the water, the oven and the universe (in kJ/K) when 1 kg of liquidwater at 25°C is heated to saturated vapor at 100°C in an oven that is at 150°C.Answers: ASH20= 6.988 kJ/K; ASoven = -6.076 kJ/K; AS universe = 0.912 kJ/K

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Answered: What is the entropy change of the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A piston-cylinder device initially contains 1 kg saturated liquid water at 200°C. Now heat is transferred to the water until the volume quadruples and the cylinder contains saturated vapor only. The saturated liquid properties of water at 200°C 3 are vf= 0.001157 m³/kg and uf= 850.46 kJ/kg (Table A-4). Water 71 kg 200°C Q Determine the internal energy change of the water. The change in internal energy is kJ.
A mass of 5kg of air expands in a polytropic process with n=1.2 from 300 kPa and 1.5m3until double its volume. The air is then compressed in a process at a constant temperature until it returns to itsinitial volume.Determine:a) Boundary work and heat (in kJ) during the polytropic process (process 1-2)(b) Temperatures 1 and 2c) Boundary and heat work for constant temperature compression process (2-3 process) For air you can use: R = 0.287 kJ/kg. K Cv = 0.718 kJ/kg. K Cp = 1,005 kJ/kg.K
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A piston–cylinder device contains 4 kg of argon at 250 kPa and 35°C. During a quasi-equilibrium, isothermal expansion process, 12 kJ of boundary work is done by the system, and 3 kJ of paddle-wheel work is done on the system. Determine the heat transfer for this process. (Round the final answer to the nearest whole number.) The heat transfer for this process is ................... kJ
A piston-cylinder device initially contains 1 kg saturated liquid water at 200°C. Now heat is transferred to the water until the volume quadruples and the cylinder contains saturated vapor only. The saturated liquid properties of water at 200°C 3 are vf= 0.001157 m³/kg and uf- 850.46 kJ/kg (Table A-4). Water m kg 200°C 2 Determine the final volume of the cylinder. (You must provide an answer before moving to the next part) m³. 3 The final volume of the cylinder is
Before the widespread use of mechanical refrigeration, cooling was provided by ice, which was delivered by icemen and stored in an icebox. In a current application, blocks of ice at Tice = 32°F with a total mass of mice = 500 lbm are placed in a large food-storage icebox that is used to keep food at Tfood = 45°F on a day in which the outdoor temperature is Tamb = 78°F. The rate of heat loss through the walls of the ice box is Q = 2900 Btu/hr. a.) Estimate the amount of time the ice it will take this ice to melt. b.) Compare the rate of cooling provided in ton units to the mass of ice in tons. c.) Define and calculate efficiency for this process. d.) Determine the change in exergy of the ice in this process. e.) Calculate the Second-Law efficiency for this process.
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6. A well-sealed room contains 60 kg of air at 200 kPa and 25°C. Now solar energy enters the room at an average rate of 0.8 kJ/s while a 120-W fan is turned on to circulate the air in the room. If heat transfer through the walls is negligible, Solve for the air temperature in the room in 30 min. (3 DECIMAL IN FINAL ANSWER PLS)
Water initially at 100 kPa and 300°C undergoes an isobaric process in a closed piston-cylinder until the volume doubles. Calculate the amount of work out of the system, in kJ/kg. Round your answer to one decimal point. Calculate the amount of heat into the system, in kJ/kg. Round your answer to one decimal point.
What is the entropy change of the water, the oven and the universe (in kJ/K) when 1 kg of liquid water at 25°C is heated to saturated vapor at 100°C in an oven that is at 150°C. Answers: ASH20= 6.988 kJ/K; ASoven = -6.076 kJ/K; AS universe = 0.912 kJ/K

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What is the entropy change of the water, the oven and the universe (in kJ/K) when 1 kg of liquid water at 25°C is heated to saturated vapor at 100°C in an oven that is at 150°C. Answers: ASH20= 6.988 kJ/K; ASoven = -6.076 kJ/K; AS universe = 0.912 kJ/K