As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,700 J of work. (a) What is the engine's efficiency (in percent)? ________% (b) The burning gasoline has a temperature of about 5,000°F (3,000 K). The waste heat from the engine flows into air at about 88°F (304 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?
As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,700 J of work. (a) What is the engine's efficiency (in percent)? ________% (b) The burning gasoline has a temperature of about 5,000°F (3,000 K). The waste heat from the engine flows into air at about 88°F (304 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter18: Heat Engines, Entropy, And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 18P
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As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,700 J of work.
(a) What is the engine's efficiency (in percent)?
________%
(b) The burning gasoline has a temperature of about 5,000°F (3,000 K). The waste heat from the engine flows into air at about 88°F (304 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?
________ %
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