Solutions Manual - Chapter 7
SOLUTION MANUAL
CHAPTER 7
Borgnakke and Sonntag
CONTENT CHAPTER 7
SUBSECTION
In-Text concept questions
Concept problems
Heat engines and refrigerators
Second law and processes
Carnot cycles and absolute temperature
Finite ∆T heat transfer
Ideal gas Carnot cycles review problems
PROB NO. a-g 1-14
15-36
37-43
44-77
78-91
92-95
96-113
Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which this textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.
Borgnakke and Sonntag
In-Text Concept Questions
Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which this textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.
Borgnakke and Sonntag
7.a
Electrical appliances (TV, stereo) use electric power as input. What happens to the power? Are those heat engines? What does the second law say about those devices? Most electric appliances such as TV, VCR, stereo and clocks dissipate power in electrical circuits into internal energy (they get warm) some power goes into light and some power into mechanical energy. The light is absorbed by the room walls, furniture etc. and the mechanical energy is dissipated by friction so all the power eventually ends up as internal energy in the room mass of air and other substances.
These are not heat engines, just the opposite happens, namely electrical power is turned into internal energy and
CHAPTER 7
Borgnakke and Sonntag
CONTENT CHAPTER 7
SUBSECTION
In-Text concept questions
Concept problems
Heat engines and refrigerators
Second law and processes
Carnot cycles and absolute temperature
Finite ∆T heat transfer
Ideal gas Carnot cycles review problems
PROB NO. a-g 1-14
15-36
37-43
44-77
78-91
92-95
96-113
Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which this textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.
Borgnakke and Sonntag
In-Text Concept Questions
Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which this textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.
Borgnakke and Sonntag
7.a
Electrical appliances (TV, stereo) use electric power as input. What happens to the power? Are those heat engines? What does the second law say about those devices? Most electric appliances such as TV, VCR, stereo and clocks dissipate power in electrical circuits into internal energy (they get warm) some power goes into light and some power into mechanical energy. The light is absorbed by the room walls, furniture etc. and the mechanical energy is dissipated by friction so all the power eventually ends up as internal energy in the room mass of air and other substances.
These are not heat engines, just the opposite happens, namely electrical power is turned into internal energy and