Part A
A Carnot engine has an efficiency e = 0.25. The temperature of the cold reservoir is 250 K. What is the temperature of the hot reservoir?
Express your answer in kelvins.
Part B
What is the change of entropy of the engine if it absorbs 160 J of heat energy during an isothermal expansion?
Express your answer in joules per kelvin.
Part A A Carnot engine has an efficiency e = 0.25. The temperature of the cold...
A Carnot engine has an efficiency of 0.445, and the temperature of its cold reservoir is 434 K. (a) Determine the temperature of its hot reservoir. (b) If 5610 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine?
1.The efficiency of a Carnot engine is 27%. The engine absorbs 826 J of energy per cycle by heat from a hot reservoir at 503 K. (a) Determine the energy expelled per cycle. _ J (b) Determine the temperature of the cold reservoir. _K 2.A sample of helium behaves as an ideal gas as energy is added by heat at constant pressure from 273 K to 343 K. If 15.0 J of work is done by the gas during this...
A Carnot engine has an efficiency of 0.45. The Kelvin temperature of its hot reservoir is quadrupled, and the Kelvin temperature of its cold reservoir is doubled. What is the efficiency that results from these changes?
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%?
1. A Carnot engine has a hot reservoir at 250 degrees C, and a a cold reservoir at 25.0 degrees C. What is the efficiency of this engine? A) 10% B) 43% C) 57% D) 90% 2. A heat engine does 50 J of work and dumps 30 J of heat into the cold reservoir. How much heat was absorbed from the hot reservoir? A) 20 J B) 30 J C) 50 J D) 80 J 3. A heat engine...
A Carnot engine has an efficiency of 26.7%. It operates between constant-temperature reservoirs differing in temperature by 50.4 Cº. In kelvins, what are (a) the temperature of the hot reservoir and (b) the temperature of the cold reservoir? (a) Number Units (b) Number Units
The input heat of a Carnot engine is 3,000 J. The temperature of a hot reservoir is 600 K and that of a cold reservoir is 300 K. What is the work done? Hint: The efficiency e of a Carnot engine is defined as the ratio of the work done, W, by the engine to the input heat QH : e=W/QH. W=QH – QC, where Qc is the output heat. That is, e=1-Qc/QH =1-Tc/TH, where Tc for a temperature of...
The efficiency of a Carnot engine is e=1-Tc/TH, where Tc is a temperature of the cold reservoir and TH is a temperature of the hot reservoir. What is the condition to have 100% efficiency? Hint: What is the mathematical condition for Tc/TH to be zero.
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A Carnot engine has an efficiency of 31.2%. It operates between constant-temperature reservoirs differing in temperature by 140 C°. In kelvins, what are (a) the temperature of the hot reservoir and (b) the temperature of the cold reservoir? (a) Number Units Units (b) Number
A Carnot engine operates with a cold reservoir at a temperature of TL = 400 K and a hot reservoir at a temperature of TH = 500 K. What is the net entropy change as it goes through a complete cycle?