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A heat engine operates between - 120°C and 450°C. It produces 10 kJ of work with...
Fall 2019 PChem 2. A certain heat engine operates between 590 °C and 170 °C. (a)...
Fall 2019 PChem 2. A certain heat engine operates between 590 °C and 170 °C. (a) What is the maximum efficiency of the engine? (b) How much heat is needed from the hot source for each 1.0 kJ of maximum work done? (c) For each 1.0 kJ of heat discharged into the cold sink, how much heat is supplied by the hot source? How much heat is discharged into the cold sink in a reversible process for each 1.0 kJ...
Fall 2019 PChem 7. A certain heat engine operates between 590 °C and 170 °C. (a)...
Fall 2019 PChem 7. A certain heat engine operates between 590 °C and 170 °C. (a) What is the maximum efficiency of the engine? (b) How much heat is needed from the hot source for each 1.0 kJ of maximum work done? (c) For each 1.0 kJ of heat discharged into the cold sink, how much heat is supplied by the hot source? How much heat is discharged into the cold sink in a reversible process for each 1.0 kJ...
5. A certain heat engine operates between 1000 K and 500 K a) What is the...
5. A certain heat engine operates between 1000 K and 500 K a) What is the maximum efficiency of the engine? (ANS: 0.5) b) Calculate the maximum work that can be done per kJ of heat supplied by the hot source. (ANS: 0.5 kJ) c) How much heat is discharged into the cold sink in a reversible process for each kJ supplied by the hot source? (ANS: 0.25)
Question 2 (20%) A heat engine takes 425 kJ of heat from a reservoir at 1000...
Question 2 (20%) A heat engine takes 425 kJ of heat from a reservoir at 1000 °C and discharges its excess heat to a reservoir at 400 °C. This heat engine produces 200 kJ net work. Explain mathematically if this engine is reversible or irreversible and if it is possible to have such a heat engine. Describe the physical reasoning behind your answer.
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K...
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K and discharging 1000 kJ by heat transfer at a temperature of 450 K. There are ho other heat transfers. Appling the lausus Inequality, determine entropy generation, if the thermal efficiency is 50%. Also comment if the cycle is 15. Extra-credit (10 Pts.) reversible, irreversible, or impossible? Explain your reasoning. press entropy balance using heat engine efficiency in terms of O's. Remember this is not...
Question 12 PHYSICS 120 (a) Carefully explain the difference between irreversible and reversible processes. Also explain...
Question 12 PHYSICS 120 (a) Carefully explain the difference between irreversible and reversible processes. Also explain what the second law of thermodynamics dictates about reversible processes. (You may find it helpful to compare water freezing at 0 °C and super- cooled water freezing at-5 °C.) [5 marks A heat engine operates with an efficiency n = 0.30 between two energy reservoirs at temperatures of 450 K and 293 K. The engine does 90 J of work per cycle. (b) Draw...
a carnot's engine working between 277 C and 27 C produces 100 kj work .Calculate the...
a carnot's engine working between 277 C and 27 C produces 100 kj work .Calculate the heat rejected from the engine . a) Q2= 20 kj b) Q2=40 kj c)Q3=10 kj d)Q4=30 kj
A heat engine operates between two reservoirs at 1000°C and 20°C. The heat engine is used...
A heat engine operates between two reservoirs at 1000°C and 20°C. The heat engine is used to drive a Carnot heat pump that removes heat from the cold surroundings at 5°C and transfers it to a house maintained at 25°C. If the house is losing heat at a rate of 20 kW. Determine: i) the thermal efficiency of the heat engine ii) the minimum rate of heat supply to the heat engine required to keep the house at 25°C
A reversible heat engine operates between a high temperature reservoir at Th and a low temperature...
A reversible heat engine operates between a high temperature reservoir at Th and a low temperature reservoir at Tư. The work produced by the heat engine is used to drive a reversible refrigerator that operates between the same two reservoirs. Determine if the low temperature reservoir is being cooled or heated. (30 points). High Temp. Reservoir @ TH QH ORH HE,H w net HE R QHEL Teru Low Temp. Reservoir @ TL
A reversible heat engine receives heat of 2000 kJ from a furnace at temperature of 600...
A reversible heat engine receives heat of 2000 kJ from a furnace at temperature of 600 0C and rejects waste heat into the house. The portion of work produced by this heat engine utilized to drive a reversible heat pump to warmup the same house during the winter. The house is to be maintained at 21 0C at all times even though outside temperature drops to -15 0C. If the net-work output of the combined heat engine and heat pump...
Fall 2019 PChem 2. A certain heat engine operates between 590 °C and 170 °C. (a) What is the maximum efficiency of the engine? (b) How much heat is needed from the hot source for each 1.0 kJ of maximum work done? (c) For each 1.0 kJ of heat discharged into the cold sink, how much heat is supplied by the hot source? How much heat is discharged into the cold sink in a reversible process for each 1.0 kJ...
Fall 2019 PChem 7. A certain heat engine operates between 590 °C and 170 °C. (a) What is the maximum efficiency of the engine? (b) How much heat is needed from the hot source for each 1.0 kJ of maximum work done? (c) For each 1.0 kJ of heat discharged into the cold sink, how much heat is supplied by the hot source? How much heat is discharged into the cold sink in a reversible process for each 1.0 kJ...
5. A certain heat engine operates between 1000 K and 500 K a) What is the maximum efficiency of the engine? (ANS: 0.5) b) Calculate the maximum work that can be done per kJ of heat supplied by the hot source. (ANS: 0.5 kJ) c) How much heat is discharged into the cold sink in a reversible process for each kJ supplied by the hot source? (ANS: 0.25)
Question 2 (20%) A heat engine takes 425 kJ of heat from a reservoir at 1000 °C and discharges its excess heat to a reservoir at 400 °C. This heat engine produces 200 kJ net work. Explain mathematically if this engine is reversible or irreversible and if it is possible to have such a heat engine. Describe the physical reasoning behind your answer.
A system executes a power cycle while receiving heat transfer at a temperature of 1000 K and discharging 1000 kJ by heat transfer at a temperature of 450 K. There are ho other heat transfers. Appling the lausus Inequality, determine entropy generation, if the thermal efficiency is 50%. Also comment if the cycle is 15. Extra-credit (10 Pts.) reversible, irreversible, or impossible? Explain your reasoning. press entropy balance using heat engine efficiency in terms of O's. Remember this is not...
Question 12 PHYSICS 120 (a) Carefully explain the difference between irreversible and reversible processes. Also explain what the second law of thermodynamics dictates about reversible processes. (You may find it helpful to compare water freezing at 0 °C and super- cooled water freezing at-5 °C.) [5 marks A heat engine operates with an efficiency n = 0.30 between two energy reservoirs at temperatures of 450 K and 293 K. The engine does 90 J of work per cycle. (b) Draw...
A heat engine operates between two reservoirs at 1000°C and 20°C. The heat engine is used to drive a Carnot heat pump that removes heat from the cold surroundings at 5°C and transfers it to a house maintained at 25°C. If the house is losing heat at a rate of 20 kW. Determine: i) the thermal efficiency of the heat engine ii) the minimum rate of heat supply to the heat engine required to keep the house at 25°C
A reversible heat engine operates between a high temperature reservoir at Th and a low temperature reservoir at Tư. The work produced by the heat engine is used to drive a reversible refrigerator that operates between the same two reservoirs. Determine if the low temperature reservoir is being cooled or heated. (30 points). High Temp. Reservoir @ TH QH ORH HE,H w net HE R QHEL Teru Low Temp. Reservoir @ TL
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