| 71. |
What is the specific heat of a metal if 45.0 g of metal transferred
from boiling water into 225 g of water at 21.2oC reaches
equilibrium with the water at 24.1oC?
The specific heat of water is 4.18 J/goC.
Answer
|
|
A. |
0.162 J/goC |
C. |
0.405 J/goC |
|
B. |
0.364 J/goC |
D. |
0.809 J/goC |
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| 72. |
How much heat is
necessary to convert 25.0 g of ice at -15.0oC into steam at
145.0oC?
cice = 2.06 J/goC; cwater = 4.18 J/goC;
csteam = 2.02 J/goC; Lfusiton = 334
J/g; and
Lvaporization = 2260 J/g Answer
|
|
A. |
6690 J |
C. |
78,400 J |
|
B. |
56,500 J |
D. |
81,600 J |
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| 73. |
Which phase change
has an increase in entropy? Answer
|
|
A. |
solid to liquid |
C. |
gas to solid |
|
B. |
gas to liquid |
D. |
liquid to solid |
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| 74. |
| Which of the graphs to the right
represents Pressure versus Temperature for a fixed mass of an
ideal gas at a constant Volume?
Answer
|
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|
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Use the graph to the right for the
next 3 questions. 1.00 kg mass was heated.
Answers |
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| 75. |
What is the specific
heat of the liquid phase?
|
|
A. |
0.500 J/goC |
C. |
1.50 J/goC |
|
B. |
1.00 J/goC |
D. |
2.00 J/goC |
|
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| 76. |
What is the Latent
Heat of Vaporization?
|
|
A. |
50.0 J/g |
C. |
150. J/g |
|
B. |
100. J/g |
D. |
200. J/g |
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| 77. |
The boiling point of
the substance under these conditions is
|
|
A. |
100.oC |
C. |
200.oC |
|
B. |
150.oC |
D. |
250.oC |
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| 78. |
| Which graph to the right is correct?
Answer |
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| 79. |
Which phase has the
greatest amount of entropy? Answer
|
|
A. |
solid |
C. |
gas |
|
B. |
liquid |
D. |
all equal entropy |
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| 80. |
Which gas behaves
most like an ideal gas? Answer
|
|
A. |
oxygen |
C. |
carbon dioxide |
|
B. |
ammonia |
D. |
helium |
