A Gasoline engine is cooled with 4 kg of water. The engine is turned on at an ambient temperature of 45° F and does mechanical work. After a few minutes, the exposed water has heated up and all of it evaporated. How much energy was used in the heating and evaporating the water?

A Gasoline engine is cooled with 4 kg of water. The engine is turned on at an ambient temperature of 45° F and does mechanical work. After a few minutes, the exposed water has heated up and all of it evaporated. How much energy was used in the heating and evaporating the water?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter12: The Laws Of Thermodynamics

Section: Chapter Questions

Problem 44P: A power plant has been proposed that would make use of the temperature gradient in the ocean. The...

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Concept explainers

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.

Question

Q3 A Gasoline engine is cooled with 4 kg of water. The engine is turned on at an
ambient temperature of 45° F and does mechanical work. After a few minutes,
the exposed water has heated up and all of it evaporated. How much energy
was used in the heating and evaporating the water?

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