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AP Physics Unit 8 Gas Laws and PV Graphs (3) Flashcards | StudBud
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AP Physics Unit 8 Gas Laws and PV Graphs (3)
AP Physics Unit 8 Gas Laws and PV Graphs (3)
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Questions
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Answers
1
If the change in internal energy of 3 moles of gas is 3000 J, what is the temperature increase?
40 K
120 K
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80 K
2
For which process is there more work done by the gas? (Assume both start at the top left)
Both do the same amount of work
Isothermal
Adiabatic
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3
Which of the following is true about an isovolumetric process?
The heat added to the system is always zero
The work done and the change in energy are both positive
The work done and the change in energy are both negative
The heat and change in internal energy are equal
4
Which graph correctly depicts pressure as a function of temperature if constant volume?
A
B
C
D
5
During which process is there the most work done on/by the gas?
3
2
4
1
6
How could you get the work done for the cycle?
Area under BC
Area under AB
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Area of the triangle
7
If the change in internal energy of a gas is 3000 J, what is the increase in temperature?
243 K
127 K
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11 K
8
5 moles of a 25°C ideal gas are placed in a .01 m
3
container. Find the pressure of the gas!
1240 Pa
104 kPa
1240 kPa
104 Pa
9
T
h
= 300 K, T
c
= 240 K, what is the ideal efficiency of the heat engine?
25%
100%
20%
80%
10
What must be true about Q for the following process?
It's equal to zero
It's positive
It's equal to ∆U
It's equal to the work done
11
How does the temperature at B compare with the temperature at C?
TB=2Tc
TB=Tc
TB=.5Tc
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12
Which graph correctly depicts pressure as a function of volume if temperature is constant?
B
A
C
D
13
If the magnitude of the work done for the cycle ABCA is 3200 J, what is Q?
+3200 J
-3200 J
0 J
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14
If Q=-2000 J, what is the change in internal energy of the gas?
0 J
+2000 J
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-2000 J
15
Which ladybug has a lower linear speed?
Not enough ladybugs to tell
Ladybug 1
Ladybug 2
Both have the same linear speed
16
Which of the following is a vector?
Universal gas constant
Number of moles
Boltzmann constant
Velocity
17
What happens to the temperature of the gas during phase 2?
Decreases
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Increases
Stays the same
18
What is the change in internal energy of the gas for the cycle ABCA?
Negative
Zero
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Positive
