Answered: A freezer needs an input power of 93.6…

A freezer needs an input power of 93.6 W to convert 1.80 kg of water at 25.0°C to 1.80 kg of ice at −25.0°C in one hour. What is the coefficient of performance of the freezer?

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 3P

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Question

A freezer needs an input power of 93.6 W to convert 1.80 kg of water at 25.0°C to 1.80 kg of ice at −25.0°C in one hour. What is the coefficient of performance of the freezer?

An inventor is marketing a device and claims that it takes 25. 00 kJ of heat at 327.00°C and discards heat to the environment at 27.00°C. What is the maximum possible efficiency of this engine?

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