A. Multiple Choice. Choose the letter that corresponds to the correct answer. Which of the following physical processes is exothermic? boiling of water 1. a. evaporation of alcohol condensation of water vapor C. b. melting of ice d. 2. An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in temperature imply? a. The solid is insoluble. The process is exothermic. C. b. The solid releases heat. The process is endothermic. d. Which of the following will be the best conductor of heat? aluminum (c=0.900 J/g.°C) a. с. lead (c 0.160 J/g.°C) b. copper (c=0.385 J/g.°C) d. magnesium (c= 1.020 J/g-°C) 3.
A. Multiple Choice. Choose the letter that corresponds to the correct answer. Which of the following physical processes is exothermic? boiling of water 1. a. evaporation of alcohol condensation of water vapor C. b. melting of ice d. 2. An aqueous solution becomes cold when a solid is dissolved in the water. What does the decrease in temperature imply? a. The solid is insoluble. The process is exothermic. C. b. The solid releases heat. The process is endothermic. d. Which of the following will be the best conductor of heat? aluminum (c=0.900 J/g.°C) a. с. lead (c 0.160 J/g.°C) b. copper (c=0.385 J/g.°C) d. magnesium (c= 1.020 J/g-°C) 3.
ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction
Section: Chapter Questions
Problem 4STP
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Question
1 2 3
![Test Yourself
ochromic
osed to.
Multiple Choice. Choose the letter that corresponds to the correct answer.
Which of the following physical processes is exothermic?
boiling of water
A.
" shirts,
rface of
1.
evaporation of alcohol
condensation of water vapor
items.
C.
a.
d.
b.
melting of ice
An aqueous solution becomes cold when a solid is dissolved in the water. What does the
decrease in temperature imply?
2.
The solid is insoluble.
The process is exothermic.
с.
a.
d.
The process is endothermic.
b.
The solid releases heat.
Which of the following will be the best conductor of heat?
aluminum (c=0.900 J/g.°C)
3.
lead (c=0.160 J/g.°C)
C.
a,
d.
magnesium (c=1.020 J/g-°C)
copper (c=0.385 J/g.°C)
Electrolysis dissociates liquid water molecules into hydrogen and oxygen gases with the use
of electricity. Which thermochemical equation represents the reaction?
H(g) + 0,(g) H,O()
b.
4.
AH=-285.8 kJ/mol
a.
AH= 571.6 kJ/mol
AH= 285.8 kJ/mol
AH=571.6 kJ/mol
b.
2H,(g) + 0,(g) 2H,0()
H,Og) →
H(g) + 0,(g)
с.
d.
2H,O() → 2H,(g) + 0,(g)
Nitrogen dioxide (NO,) is cooled to produce dinitrogen tetroxide (N,O,). Which thermo-
chemical equation represents the reverse reaction?
5.
AH? of NO,=33.9 kJ/mol
AH? of N,O,=9.2 kJ/mol
N,O.(g)
- 2NO,(3)
AH=24.7 kJ/mol
a.
AH=58,6 kJ/mol
AH=-24.7 kJ/mol
b.
N,0,(g)
→ 2NO,(g)
2NO,(g)
N,O,()
с.
d.
2NO,(g) → N,O,(g)
AH=-58,6 kJ/mol
6.
How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to
35°C?
4.18 J
с.
3375 J
a.
3027 J
d. 6054 J
b.
7.
How much heat is absorbed by 750 grams of water as it is heated from 25.0°C to 96.0°C?
223 kJ
с.
53 kJ
a.
d. 301 kJ
b. 72 kJ
Chapter 3 Energy in Transit 71](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F757a1c64-3b22-4918-9a9c-cc1a136cdce6%2F16729d61-bce2-4120-bad2-80cc17a873b7%2F0dyg2jf_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Test Yourself
ochromic
osed to.
Multiple Choice. Choose the letter that corresponds to the correct answer.
Which of the following physical processes is exothermic?
boiling of water
A.
" shirts,
rface of
1.
evaporation of alcohol
condensation of water vapor
items.
C.
a.
d.
b.
melting of ice
An aqueous solution becomes cold when a solid is dissolved in the water. What does the
decrease in temperature imply?
2.
The solid is insoluble.
The process is exothermic.
с.
a.
d.
The process is endothermic.
b.
The solid releases heat.
Which of the following will be the best conductor of heat?
aluminum (c=0.900 J/g.°C)
3.
lead (c=0.160 J/g.°C)
C.
a,
d.
magnesium (c=1.020 J/g-°C)
copper (c=0.385 J/g.°C)
Electrolysis dissociates liquid water molecules into hydrogen and oxygen gases with the use
of electricity. Which thermochemical equation represents the reaction?
H(g) + 0,(g) H,O()
b.
4.
AH=-285.8 kJ/mol
a.
AH= 571.6 kJ/mol
AH= 285.8 kJ/mol
AH=571.6 kJ/mol
b.
2H,(g) + 0,(g) 2H,0()
H,Og) →
H(g) + 0,(g)
с.
d.
2H,O() → 2H,(g) + 0,(g)
Nitrogen dioxide (NO,) is cooled to produce dinitrogen tetroxide (N,O,). Which thermo-
chemical equation represents the reverse reaction?
5.
AH? of NO,=33.9 kJ/mol
AH? of N,O,=9.2 kJ/mol
N,O.(g)
- 2NO,(3)
AH=24.7 kJ/mol
a.
AH=58,6 kJ/mol
AH=-24.7 kJ/mol
b.
N,0,(g)
→ 2NO,(g)
2NO,(g)
N,O,()
с.
d.
2NO,(g) → N,O,(g)
AH=-58,6 kJ/mol
6.
How much heat does a 15-gram piece of aluminum metal release as it cools from 260°C to
35°C?
4.18 J
с.
3375 J
a.
3027 J
d. 6054 J
b.
7.
How much heat is absorbed by 750 grams of water as it is heated from 25.0°C to 96.0°C?
223 kJ
с.
53 kJ
a.
d. 301 kJ
b. 72 kJ
Chapter 3 Energy in Transit 71
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