23. The Second Law of Thermodynamics
Heat Engines and the Second Law of Thermodynamics
23. The Second Law of Thermodynamics
Heat Engines and the Second Law of Thermodynamics
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- Multiple Choice
An aircraft engine takes in 9 kJ of heat and expels 6.4 kJ of heat each cycle. How much mechanical work does the engine do each cycle?
533views5rank - Multiple Choice
A heat engine uses a tank of ice water as a cold reservoir. The engine takes in 8 kJ of heat from the hot reservoir, and the heat expelled melts 18g of ice in the tank. How much work does this engine do?
943views - Multiple Choice
A steam turbine takes in 75g of water and boils it as heat energy to run a 40% efficient engine. How much work does this engine do per cycle?
500views4rank - Multiple ChoiceA heat engine exhausts per cycle while doing of work. What is the efficiency of this engine?314views
- Textbook QuestionA Carnot refrigerator is operated between two heat reservoirs at temperatures of 320 K and 270 K. (c) What is the coefficient of performance of the refrigerator?426views
- Textbook QuestionA Carnot refrigerator is operated between two heat reservoirs at temperatures of 320 K and 270 K. (b) If the refrigerator completes 165 cycles each minute, what power input is required to operate it?508views
- Textbook QuestionA Carnot refrigerator is operated between two heat reservoirs at temperatures of 320 K and 270 K. (a) If in each cycle the refrigerator receives 415 J of heat energy from the reservoir at 270 K, how many joules of heat energy does it deliver to the reservoir at 320 K?670views
- Textbook QuestionA diesel engine performs 2200 J of mechanical work and discards 4300 J of heat each cycle. (a) How much heat must be supplied to the engine in each cycle?1024views