Real engines when compared to the Carnot engine are a.more efficient. b.less efficient. c.hotter. d.colder. e.less...
Real engines when compared to the Carnot engine are
a.more efficient.
b.less efficient.
c.hotter.
d.colder.
e.less theoretical.
Homework Answers
Real engines are less efficent than carnot engine if work on the same temperature of the source and sink.
carnot engine is a theoritical engine which have maximum possible efficiency at tha temperature.
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Real engines when compared to the Carnot engine are
a.more efficient.
b.less efficient.
c.hotter.
d.colder.
e.less...
When a Carnot engine is operated in reversed direction it becomes a Carnot refrigerator. A Carnot...
When a Carnot engine is operated in reversed direction it becomes a Carnot refrigerator. A Carnot engine has thermal efficiency e= 0.87 What is the coefficient of performance when it is operated as a Carnot refrigerator?
When a Carnot engine is operated in reversed direction it becomes a Carnot refrigerator. A Carnot...
When a Carnot engine is operated in reversed direction it becomes a Carnot refrigerator. A Carnot engine has thermal efficiency e = 0.10 What is the coefficient of performance when it is operated as a Carnot refrigerator?
Problem 6. Why do you think Carnot engine is the most efficient engine? Choose all correct...
Problem 6. Why do you think Carnot engine is the most efficient engine? Choose all correct answers. 4 marks a. adiabatic and isothermal paths are most efficient out of all paths. b. the cold reservoir is at 0 K temperature. c. the processes are done reversibly. d. as long as you do work in a cycle, the engine is always going to be efficient. e. the two adiabatic processes where there is no heat lost is the key. f. no...
= Efficiency of real heat engines We showed that the efficiency of an ideal heat engine...
= Efficiency of real heat engines We showed that the efficiency of an ideal heat engine is given by TH-TL TL Nideal 1 TH Real heat-engines must be run at non-zero speeds, so they cannot be exactly quasi- static. Prove that the efficiency of a real heat engine is less than that of an ideal heat engine. ΤΗ n< Nideal
2. Two reversible Carnot heat engines operate in series between a source at 427°C and a...
2. Two reversible Carnot heat engines operate in series between a source at 427°C and a sink at 17°C. If the engines have equal efficiencies and the first rejects 400kJ to the second, calculate: (1)the temperature at which heat is supplied to the second engine; (2) the heat taken from the source; (3)the work done by each engine.
pls i need this step by step pls 2. Two Carnot engines are operated in series...
pls i need this step by step pls
2. Two Carnot engines are operated in series with the exhaust (heat output) of the first engine being the input of the second engine. The upper temperature of this combination is 260F, the lower temperature is 40F. If each engine has the same thermal efficiency, determine the exhaust temperature of the first engine (the inlet temperature of the second engine). Ans: T = 140F
Answer Description The Carnot cycle attempts to model the most efficient possible process by avoiding what?...
Answer Description The Carnot cycle attempts to model the most efficient possible process by avoiding what? 1. Adiabatic processes 2. Isothermal processes 3. Irreversible processes 4. Reversible processes For the Carnot cycle, in what type of process is heat added or removed? 1. Adiabatic 2. Isobaric 3. Isochoric 4. Isothermal Which statement is true? 1. n carnot < nactual 2. n Carnot = nactual 3. n carnot > nactual D. A heat engine takes from heat from a reservoir at...
62. A Carnot engine operates between the temperatures Th = 1.00 x 102° C and Te...
62. A Carnot engine operates between the temperatures Th = 1.00 x 102° C and Te 20.0° C. By what factor does the theoretical efficiency increase if the temperature of the hot reservoir is increased to 5.50 x 102 C? A Carnot engine operates betwe en 100° C and 20°C. How much ice can the engine melt 64. V from its exhaust after it has done 5.0 x 104 J of work?
A) A steam engine (assume a Carnot engine ) has an efficiency of 62.9%. If the...
A) A steam engine (assume a Carnot engine ) has an efficiency of 62.9%. If the waste heat has a temperature of 13.5◦C, what is the temperature of the boiler? Answer in units of ◦C. B) The interior of a refrigerator has a surface area of 2.4 m2. It is insulated by a 3 cm thick material that has a thermal conductivity of 0.0222 J/m · s ·◦ C. The ratio of the heat ex- tracted from the interior to...
A Carnot engine operates with an efficiency of 29% when the temperature of its cold reservoir...
A Carnot engine operates with an efficiency of 29% when the temperature of its cold reservoir is 295 K. Assuming that the temperature of the hot reservoir remains the same, what must be the temperature of the cold reservoir in order to increase the efficiency to 33%?
When a Carnot engine is operated in reversed direction it becomes a Carnot refrigerator. A Carnot engine has thermal efficiency e= 0.87 What is the coefficient of performance when it is operated as a Carnot refrigerator?
When a Carnot engine is operated in reversed direction it becomes a Carnot refrigerator. A Carnot engine has thermal efficiency e = 0.10 What is the coefficient of performance when it is operated as a Carnot refrigerator?
Problem 6. Why do you think Carnot engine is the most efficient engine? Choose all correct answers. 4 marks a. adiabatic and isothermal paths are most efficient out of all paths. b. the cold reservoir is at 0 K temperature. c. the processes are done reversibly. d. as long as you do work in a cycle, the engine is always going to be efficient. e. the two adiabatic processes where there is no heat lost is the key. f. no...
= Efficiency of real heat engines We showed that the efficiency of an ideal heat engine is given by TH-TL TL Nideal 1 TH Real heat-engines must be run at non-zero speeds, so they cannot be exactly quasi- static. Prove that the efficiency of a real heat engine is less than that of an ideal heat engine. ΤΗ n< Nideal
2. Two reversible Carnot heat engines operate in series between a source at 427°C and a sink at 17°C. If the engines have equal efficiencies and the first rejects 400kJ to the second, calculate: (1)the temperature at which heat is supplied to the second engine; (2) the heat taken from the source; (3)the work done by each engine.
pls i need this step by step pls
2. Two Carnot engines are operated in series with the exhaust (heat output) of the first engine being the input of the second engine. The upper temperature of this combination is 260F, the lower temperature is 40F. If each engine has the same thermal efficiency, determine the exhaust temperature of the first engine (the inlet temperature of the second engine). Ans: T = 140F
Answer Description The Carnot cycle attempts to model the most efficient possible process by avoiding what? 1. Adiabatic processes 2. Isothermal processes 3. Irreversible processes 4. Reversible processes For the Carnot cycle, in what type of process is heat added or removed? 1. Adiabatic 2. Isobaric 3. Isochoric 4. Isothermal Which statement is true? 1. n carnot < nactual 2. n Carnot = nactual 3. n carnot > nactual D. A heat engine takes from heat from a reservoir at...
62. A Carnot engine operates between the temperatures Th = 1.00 x 102° C and Te 20.0° C. By what factor does the theoretical efficiency increase if the temperature of the hot reservoir is increased to 5.50 x 102 C? A Carnot engine operates betwe en 100° C and 20°C. How much ice can the engine melt 64. V from its exhaust after it has done 5.0 x 104 J of work?
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