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Back to 15.3 Introduction to the Second Law of Thermodynamics: Heat Engines and Their Efficiency

15.3 Exercise 11

Avg difficulty 2.5

Assume that the turbines at a coal-powered power plant were upgraded, resulting in an improvement in efficiency of 3.32%. Assume that prior to the upgrade the power station had an efficiency of 36% and that the heat transfer into the engine in one day is still the same at 2.50×1014 J2 . \text{50} \times \text{10}^{\text{14}} \text{ J}. (a) How much more electrical energy is produced due to the upgrade? (b) How much less heat transfer occurs to the environment due to the upgrade?

OpenStax College Physics 2e, 15.3 Introduction to the Second Law of Thermodynamics: Heat Engines and Their Efficiency, exercise 11

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.