ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-1
SOLUTIONS MANUAL
Thermodynamics: An Engineering Approach
10th Edition
Yunus A. Çengel, Michael A. Boles, Mehmet Kanoğlu
McGraw-Hill, 2023
Chapter 1
INTRODUCTION AND BASIC CONCEPTS
PROPRIETARY AND CONFIDENTIAL
This Manual is the proprietary property of McGraw Hill LLC and protected by copyright and other state and federal laws.
By opening and using this Manual the user agrees to the following restrictions, and if the recipient does not agree to these
restrictions, the Manual should be promptly returned unopened to McGraw Hill LLC: This Manual is being provided only
to authorized professors and instructors for use in preparing for the classes using the affiliated textbook. No other use or
distribution of this Manual is permitted. This Manual may not be sold and may not be distributed to or used by any student
or other third party. No part of this Manual may be reproduced, displayed or distributed in any form or by any means,
electronic or otherwise, without the prior written permission of McGraw Hill LLC.
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
mynursytest.store
,ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-2
CYU - Check Your Understanding
CYU 1-1 ■ Check Your Understanding
CYU 1-1.1 Choose the wrong statement about the first law of thermodynamics.
(a) During an interaction, energy can change from one form to another.
(b) During an interaction, the total amount of energy remains constant.
(c) Energy can be destroyed but it cannot be created.
(d) Energy is a thermodynamic property.
(e) A system with more energy input than output will gain energy.
Answer: (c) Energy can be destroyed but it cannot be created.
CYU 1-1.2 Which statement best expresses the second law of thermodynamics?
(a) The temperature of a well-sealed room increases when a fan in the room is turned on.
(b) A cup of cool coffee in a warm room never gets hot by itself.
(c) Heat is generated when there is friction between two surfaces.
(d) A household refrigerator supplies heat to the kitchen when operating.
(e) A person who has a smaller energy input than output will lose weight.
Answer: (b) A cup of cool coffee in a warm room never gets hot by itself.
CYU 1-2 ■ Check Your Understanding
CYU 1-2.1 Which of the following is not a correct unit for work?
(a) kg · 𝑚/𝑠2
(b) Nm
(c) kPa · 𝑚3
(d) kJ
(e) kWh
Answer: (a) kg · 𝑚/𝑠2
CYU 1-2.2 Using unit considerations, select the correct equations.
I. Mass = Force Acceleration
II. Work = Force Distance
III. Work = Power Time
IV. Density = Mass Volume
(a) I and II
(b) I and III
(c) II and III
(d) I, II, and III
(e) II, III, and IV
Answer: (c) II and III
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,ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-3
CYU 1-2.3 What is the weight of 10 kg?
(a) 10 N
(b) 10 lbf
(c) 9.8 N
(d) 98 N
(e) 322 lbf
Answer: (d) 98 N
𝑊 = mg = (10 kg)(9.8 𝑚/𝑠2) = 98 kg · 𝑚/𝑠2 = 98 𝑁
since 1 𝑁 = 1 kg · 𝑚/𝑠2
CYU 1-3 ■ Check Your Understanding
CYU 1-3.1 Choose the wrong statement regarding systems and control volumes.
(a) The mass or region outside the system is called the surroundings.
(b) The real or imaginary surface that separates the system from its surroundings is called the boundary.
(c) The boundary has zero thickness.
(d) The boundary can neither contain any mass nor occupy any volume in space.
(e) The boundary of a system is fixed; it cannot move.
Answer: (e) The boundary of a system is fixed; it cannot move.
CYU 1-3.2 Choose the wrong statement regarding systems and control volumes.
(a) Both mass and energy can cross the boundary of a control volume.
(b) Mass cannot enter or leave a closed system but energy can.
(c) Mass can enter or leave an isolated system but energy cannot.
(d) The boundaries of a control volume can be real or imaginary.
(e) The volume of a closed system does not have to be fixed.
Answer: (c) Mass can enter or leave an isolated system but energy cannot.
CYU 1-4 ■ Check Your Understanding
CYU 1-4.1 Which properties are intensive?
I. Volume, 𝑚3
II. Density, kg/𝑚3
III. Temperature, C
IV. Pressure, kPa
(a) II and III
(b) III and IV
(c) I, II and III
(d) II, III, and IV
(e) I, II, III, and IV
Answer: (d) II, III, and IV
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
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, ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-4
CYU 1-5 ■ Check Your Understanding
CYU 1-5.1 A 1 − 𝑚3 tank contains 0.5 kg of a gas. What is the density (in kg/𝑚3) and specific volume (in 𝑚3/𝑘𝑔) of the
fluid, respectively?
(a) 1, 0.5
(b) 0.5, 1
(c) 0.5, 2
(d) 2, 0.5
(e) 0.5, 0.5
Answer: (c) 0.5, 2
rho = 𝑚/𝑉 = (0.5 kg)/(1 𝑚3) = 0.5 kg/𝑚3
𝑣 = 𝑉/𝑚 = (1 𝑚3)/(0.5 kg) = 2 𝑚3/kg
CYU 1-5.2 What is the specific volume of a fluid whose specific gravity is 1.25?
(a) 1.25 𝑚3/kg
(b) 1250 𝑚3/kg
(c) 1/1.25 𝑚3/kg
(d) 1/1250 𝑚3/kg
(e) 1.25 𝑚3/kg
Answer: (d) 1/1250 𝑚3/kg
rho = SG rhow = (1.25)(1000 kg/𝑚3) = 1250 kg/𝑚3
𝑣 = 1/rho = 1/(1250 kg/𝑚3) = 1/1250 𝑚3/kg
CYU 1-5.3 What is the specific weight of a fluid whose specific gravity is 1?
(a) 1 𝑁/𝑚3
(b) 9.8 𝑁/𝑚3
(c) 10 𝑁/𝑚3
(d) 980 𝑁/𝑚3
(e) 9800 𝑁/𝑚3
Answer: (e) 9800 𝑁/𝑚3
SW = rhog = (1000 kg/𝑚3)(9.8 𝑚/𝑠2) = 9800 kg · 𝑚/𝑚3 · 𝑠2 = 9800 𝑁/𝑚3
since 1 𝑁 = 1 kg · 𝑚/𝑠2
CYU 1-6 ■ Check Your Understanding
CYU 1-6.1 Choose the wrong statement regarding state and equilibrium.
(a) A set of properties completely describes the state of a system.
(b) At a given state, all the properties of a system have fixed values.
(c) The state of a system only changes if the values of at least two properties change.
(d) In an equilibrium state there are no driving forces within the system.
(e) A system in equilibrium experiences no changes when it is isolated from its surroundings.
Answer: (c) The state of a system only changes if the values of at least two properties change.
CYU 1-8 ■ Check Your Understanding
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
mynursytest.store
Cengel
1-1
SOLUTIONS MANUAL
Thermodynamics: An Engineering Approach
10th Edition
Yunus A. Çengel, Michael A. Boles, Mehmet Kanoğlu
McGraw-Hill, 2023
Chapter 1
INTRODUCTION AND BASIC CONCEPTS
PROPRIETARY AND CONFIDENTIAL
This Manual is the proprietary property of McGraw Hill LLC and protected by copyright and other state and federal laws.
By opening and using this Manual the user agrees to the following restrictions, and if the recipient does not agree to these
restrictions, the Manual should be promptly returned unopened to McGraw Hill LLC: This Manual is being provided only
to authorized professors and instructors for use in preparing for the classes using the affiliated textbook. No other use or
distribution of this Manual is permitted. This Manual may not be sold and may not be distributed to or used by any student
or other third party. No part of this Manual may be reproduced, displayed or distributed in any form or by any means,
electronic or otherwise, without the prior written permission of McGraw Hill LLC.
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
mynursytest.store
,ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-2
CYU - Check Your Understanding
CYU 1-1 ■ Check Your Understanding
CYU 1-1.1 Choose the wrong statement about the first law of thermodynamics.
(a) During an interaction, energy can change from one form to another.
(b) During an interaction, the total amount of energy remains constant.
(c) Energy can be destroyed but it cannot be created.
(d) Energy is a thermodynamic property.
(e) A system with more energy input than output will gain energy.
Answer: (c) Energy can be destroyed but it cannot be created.
CYU 1-1.2 Which statement best expresses the second law of thermodynamics?
(a) The temperature of a well-sealed room increases when a fan in the room is turned on.
(b) A cup of cool coffee in a warm room never gets hot by itself.
(c) Heat is generated when there is friction between two surfaces.
(d) A household refrigerator supplies heat to the kitchen when operating.
(e) A person who has a smaller energy input than output will lose weight.
Answer: (b) A cup of cool coffee in a warm room never gets hot by itself.
CYU 1-2 ■ Check Your Understanding
CYU 1-2.1 Which of the following is not a correct unit for work?
(a) kg · 𝑚/𝑠2
(b) Nm
(c) kPa · 𝑚3
(d) kJ
(e) kWh
Answer: (a) kg · 𝑚/𝑠2
CYU 1-2.2 Using unit considerations, select the correct equations.
I. Mass = Force Acceleration
II. Work = Force Distance
III. Work = Power Time
IV. Density = Mass Volume
(a) I and II
(b) I and III
(c) II and III
(d) I, II, and III
(e) II, III, and IV
Answer: (c) II and III
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
mynursytest.store
,ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-3
CYU 1-2.3 What is the weight of 10 kg?
(a) 10 N
(b) 10 lbf
(c) 9.8 N
(d) 98 N
(e) 322 lbf
Answer: (d) 98 N
𝑊 = mg = (10 kg)(9.8 𝑚/𝑠2) = 98 kg · 𝑚/𝑠2 = 98 𝑁
since 1 𝑁 = 1 kg · 𝑚/𝑠2
CYU 1-3 ■ Check Your Understanding
CYU 1-3.1 Choose the wrong statement regarding systems and control volumes.
(a) The mass or region outside the system is called the surroundings.
(b) The real or imaginary surface that separates the system from its surroundings is called the boundary.
(c) The boundary has zero thickness.
(d) The boundary can neither contain any mass nor occupy any volume in space.
(e) The boundary of a system is fixed; it cannot move.
Answer: (e) The boundary of a system is fixed; it cannot move.
CYU 1-3.2 Choose the wrong statement regarding systems and control volumes.
(a) Both mass and energy can cross the boundary of a control volume.
(b) Mass cannot enter or leave a closed system but energy can.
(c) Mass can enter or leave an isolated system but energy cannot.
(d) The boundaries of a control volume can be real or imaginary.
(e) The volume of a closed system does not have to be fixed.
Answer: (c) Mass can enter or leave an isolated system but energy cannot.
CYU 1-4 ■ Check Your Understanding
CYU 1-4.1 Which properties are intensive?
I. Volume, 𝑚3
II. Density, kg/𝑚3
III. Temperature, C
IV. Pressure, kPa
(a) II and III
(b) III and IV
(c) I, II and III
(d) II, III, and IV
(e) I, II, III, and IV
Answer: (d) II, III, and IV
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
mynursytest.store
, ACCESS Test Bank for Thermodynamics Engineering Approach 10th Edition
Cengel
1-4
CYU 1-5 ■ Check Your Understanding
CYU 1-5.1 A 1 − 𝑚3 tank contains 0.5 kg of a gas. What is the density (in kg/𝑚3) and specific volume (in 𝑚3/𝑘𝑔) of the
fluid, respectively?
(a) 1, 0.5
(b) 0.5, 1
(c) 0.5, 2
(d) 2, 0.5
(e) 0.5, 0.5
Answer: (c) 0.5, 2
rho = 𝑚/𝑉 = (0.5 kg)/(1 𝑚3) = 0.5 kg/𝑚3
𝑣 = 𝑉/𝑚 = (1 𝑚3)/(0.5 kg) = 2 𝑚3/kg
CYU 1-5.2 What is the specific volume of a fluid whose specific gravity is 1.25?
(a) 1.25 𝑚3/kg
(b) 1250 𝑚3/kg
(c) 1/1.25 𝑚3/kg
(d) 1/1250 𝑚3/kg
(e) 1.25 𝑚3/kg
Answer: (d) 1/1250 𝑚3/kg
rho = SG rhow = (1.25)(1000 kg/𝑚3) = 1250 kg/𝑚3
𝑣 = 1/rho = 1/(1250 kg/𝑚3) = 1/1250 𝑚3/kg
CYU 1-5.3 What is the specific weight of a fluid whose specific gravity is 1?
(a) 1 𝑁/𝑚3
(b) 9.8 𝑁/𝑚3
(c) 10 𝑁/𝑚3
(d) 980 𝑁/𝑚3
(e) 9800 𝑁/𝑚3
Answer: (e) 9800 𝑁/𝑚3
SW = rhog = (1000 kg/𝑚3)(9.8 𝑚/𝑠2) = 9800 kg · 𝑚/𝑚3 · 𝑠2 = 9800 𝑁/𝑚3
since 1 𝑁 = 1 kg · 𝑚/𝑠2
CYU 1-6 ■ Check Your Understanding
CYU 1-6.1 Choose the wrong statement regarding state and equilibrium.
(a) A set of properties completely describes the state of a system.
(b) At a given state, all the properties of a system have fixed values.
(c) The state of a system only changes if the values of at least two properties change.
(d) In an equilibrium state there are no driving forces within the system.
(e) A system in equilibrium experiences no changes when it is isolated from its surroundings.
Answer: (c) The state of a system only changes if the values of at least two properties change.
CYU 1-8 ■ Check Your Understanding
© MCGRAW HILL LLC. ALL RIGHTS RESERVED. NO REPRODUCTION OR DISTRIBUTION WITHOUT THE PRIOR
WRITTEN CONSENT OF MCGRAW HILL LLC.
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