In each cyde of its operation, a heat engine expels 2,900 J of energy and performs 1,100 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (b) Find the thermal efficiency of the engine. Need Help? Read It
In each cyde of its operation, a heat engine expels 2,900 J of energy and performs 1,100 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (b) Find the thermal efficiency of the engine. Need Help? Read It
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Transcribed Image Text:In each cyde of its operation, a heat engine expels 2,900 J of energy and performs 1,100 J of mechanical work.
(a) How much thermal energy must be added to the engine in each cycle?
(b) Find the thermal efficiency of the engine.
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An engine absorbs 1.68 k) from a hot reservoir at 277°C and expels 1.25 kJ to a cold reservoir at 27°C in each cycle.
(a) What is the engine's efficiency?
(b) How much work is done by the engine in each cydle?
(c) What is the power output of the engine if each cycle lasts 0.295 s?
kW
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A freezer is used to freeze 1.5 Lof water completely into ice. The water and the freezer remain at a constant temperature of T 0°C.
(a) Determine the change in the entropy of the water.
k/K
(b) Determine the change in the entropy of the freezer.
k/K
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