Question: Please answer 29. As a gasoline engine is running, an amount of gasoline containing 15,000 J of chemical potential energy is burned in 1 s.

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29. As a gasoline engine is running, an amount of gasoline containing 15,000 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,000 J of work. (a) What is the engine's efficiency? (b) The burning gasoline has a temperature of about 4,000 F (2,500 K). The waste heat from the engine flows into air at about 80 F (300 K). What is the Carnot efficiency of a heat engine operating between these two temperatures

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