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QUESTION 9 A heat engine takes in 55 kJ/s heat at 1000°Сand releases its exhaust heat...
In one cycle, a certain heat engine takes in 1000 J1000 J of heat from its...
In one cycle, a certain heat engine takes in 1000 J1000 J of
heat from its high‑temperature reservoir and exhausts 700 J700 J of
heat to its low‑temperature reservoir.
What is the efficiency of the heat engine under these
conditions? 70%,30%,43%,143%,300%.
In one cycle, a certain heat engine takes in 1000 J of heat from its high-temperature reservoir and exhausts 700 J of heat to its low-temperature reservoir. Hot reservoir What is the efficiency of the heat engine under these...
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.
Question 3: In a gas turbine engine, the compressor takes in air at a temperature of...
Question 3: In a gas turbine engine, the compressor takes in air at a temperature of 15°C, pressure of 100 kPa, and a volumetric flow rate of 5 m3/s and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after...
QUESTION 5 A Stirling engine converts 500 kJ of heat into 200 KJ of work. How...
QUESTION 5 A Stirling engine converts 500 kJ of heat into 200 KJ of work. How much is the heat loss? a. 100 kJ b. 300 kJ C.400 kJ d.200 kJ QUESTION 6 An engine converts 400 kJ of heat into work and wastes 300 kJ. Determine the efficiency. a. 10% 0.25% C. 75% d. 90% QUESTION 7 When analyzing a reciprocating engine, the system can be considered as 9. A closed system b. A free body C. A rigid...
Question #2 10 marks) A heat engine that uses water as the working fluid is being...
Question #2 10 marks) A heat engine that uses water as the working fluid is being used to produce power in a certain location. The condenser of the heat engine is being cooled by drawing 200 kg/s of water from a nearby lake at 25°C and discharging it at 50°C. The thermal efficiency of the heat engine is 40%. Furnace Boiler Condenser 25°C | water from lake 200 kg/s V 50°C water returned to the lake Calculate: i) The amount...
A block of material requires 20 kJ of heat energy to increase its temperature from 25...
A block of material requires 20 kJ of heat energy to increase its temperature from 25 °C to 30 °C. How much heat energy is required to increase the temperature of the block from 50 °C to 55 °C? WTF. There is not enough information provided to answer the question. 40 kJ O 25 kJ O 100 kJ 20 kJ
QUESTION 1 Heat is required to dissolve NaOH(s) in water. A-True B-False -------------------- QUESTiON 2 The...
QUESTION 1 Heat is required to dissolve NaOH(s) in water. A-True B-False -------------------- QUESTiON 2 The below equation represents an exothermic reaction: Reactants + delta H ----> product ATrue B-False -------------------- QUESTION 3 The Styrofoam cup was used as an insulated device that allows heat loss A-True B-False -------------------- QUESTION 4 The following is an endothermic reaction; NaOH+ HCI------> NaCl+H2O+42.12KJ A-True B-False -------------------- QUESTION 5 NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ Calculate the amount (in moles) of NaOH needed to make the reaction above...
The solution belongs to the 1st question, i need the solution for the 2nd question. 1....
The solution belongs to the 1st question, i need the solution
for the 2nd question.
1. A single cylinder 1.6 lt, spark ignition engine is operating on the ideal Otto cycle at a compression ratio of 9. The ambient air around the engine is at 1 bar and 20 °C and the fuel consumption of the engine is 13 L/h gasoline at 5600 rpm. Evaluate a. The highest pressure and temperature in the cylinder throughout the cycle b. Net work...
all six plz (better with explaination) 25. A real (non-Carnot) heat engine, opcrating between heat reservoirs at temperatures of 650 K (hot) and 270 K (cold) performs 4.3 kJ of net work and rej...
all six plz (better with explaination)
25. A real (non-Carnot) heat engine, opcrating between heat reservoirs at temperatures of 650 K (hot) and 270 K (cold) performs 4.3 kJ of net work and rejects 8.0 kJ of heat in a single cycle. The thermal efliciency of this heat engine is closest to A. 0.35. B. 0.31 C. 0.28 D. 0.38 E. 0.42 26. A 2.0-kg block of aluminum at 50° is dropped into 5.0 kg of water at 20°C and...
A heating unit disperses 1000 J of heat into its surroundings. At which of the following...
A heating unit disperses 1000 J of heat into its surroundings. At which of the following temperatures will the entropy change of the surroundings be the greatest? O AS system = -AS surroundings, regardless of the ambient temperature ooc O 25 C O 50C O 100C Question 2 (4 points) Calculate the standard entropy change (S rxn) for the following reaction: U (s) + 3 F2 (g) → UF6 (s) 0-431 J/K 0-254 J/K O228 J/K O 886 J/K 0254...
In one cycle, a certain heat engine takes in 1000 J1000 J of
heat from its high‑temperature reservoir and exhausts 700 J700 J of
heat to its low‑temperature reservoir.
What is the efficiency of the heat engine under these
conditions? 70%,30%,43%,143%,300%.
In one cycle, a certain heat engine takes in 1000 J of heat from its high-temperature reservoir and exhausts 700 J of heat to its low-temperature reservoir. Hot reservoir What is the efficiency of the heat engine under these...
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.
Question 3: In a gas turbine engine, the compressor takes in air at a temperature of 15°C, pressure of 100 kPa, and a volumetric flow rate of 5 m3/s and compresses it to four times the initial pressure with an isentropic efficiency of 82%. The air then passes through a heat exchanger heated by the turbine exhaust before reaching the combustion chamber. In the heat exchanger 78% of the available heat is given to the air. The maximum temperature after...
QUESTION 5 A Stirling engine converts 500 kJ of heat into 200 KJ of work. How much is the heat loss? a. 100 kJ b. 300 kJ C.400 kJ d.200 kJ QUESTION 6 An engine converts 400 kJ of heat into work and wastes 300 kJ. Determine the efficiency. a. 10% 0.25% C. 75% d. 90% QUESTION 7 When analyzing a reciprocating engine, the system can be considered as 9. A closed system b. A free body C. A rigid...
Question #2 10 marks) A heat engine that uses water as the working fluid is being used to produce power in a certain location. The condenser of the heat engine is being cooled by drawing 200 kg/s of water from a nearby lake at 25°C and discharging it at 50°C. The thermal efficiency of the heat engine is 40%. Furnace Boiler Condenser 25°C | water from lake 200 kg/s V 50°C water returned to the lake Calculate: i) The amount...
A block of material requires 20 kJ of heat energy to increase its temperature from 25 °C to 30 °C. How much heat energy is required to increase the temperature of the block from 50 °C to 55 °C? WTF. There is not enough information provided to answer the question. 40 kJ O 25 kJ O 100 kJ 20 kJ
The solution belongs to the 1st question, i need the solution
for the 2nd question.
1. A single cylinder 1.6 lt, spark ignition engine is operating on the ideal Otto cycle at a compression ratio of 9. The ambient air around the engine is at 1 bar and 20 °C and the fuel consumption of the engine is 13 L/h gasoline at 5600 rpm. Evaluate a. The highest pressure and temperature in the cylinder throughout the cycle b. Net work...
all six plz (better with explaination)
25. A real (non-Carnot) heat engine, opcrating between heat reservoirs at temperatures of 650 K (hot) and 270 K (cold) performs 4.3 kJ of net work and rejects 8.0 kJ of heat in a single cycle. The thermal efliciency of this heat engine is closest to A. 0.35. B. 0.31 C. 0.28 D. 0.38 E. 0.42 26. A 2.0-kg block of aluminum at 50° is dropped into 5.0 kg of water at 20°C and...
A heating unit disperses 1000 J of heat into its surroundings. At which of the following temperatures will the entropy change of the surroundings be the greatest? O AS system = -AS surroundings, regardless of the ambient temperature ooc O 25 C O 50C O 100C Question 2 (4 points) Calculate the standard entropy change (S rxn) for the following reaction: U (s) + 3 F2 (g) → UF6 (s) 0-431 J/K 0-254 J/K O228 J/K O 886 J/K 0254...
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