Pressure Answers

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An empty plastic bottle is sealed in a cool room and then moved to a very hot room. What can best be stated about the air pressure inside the bottle when the bottle reaches room temperature?

A
It is lower than the pressure on the outside of the bottle.
B
It is higher than the pressure on the outside of the bottle.
C
It is the same as the pressure on the outside of the bottle.
D
It exerts twice the force per unit area as the air pressure outside the bottle.
2
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Which unit is commonly used for measuring pressure?

A
m3
B
bar
C
N/m3
D
Celsius
3

Equal amounts of four gases are placed in identical containers at the temperatures that are noted below.Samples of Gases at Different TemperaturesGasTemperature (°C)P10.2Q25.4R25.9S33.2Molecules of which gas would exert the greatest collision force?

A
gas P
B
gas Q
C
gas R
D
gas S
4

A hiker seals a plastic bag that contains dried fruits before he climbs a mountain. What will most likely happen to the plastic bag as the hiker reaches the top of the mountain?

A
The bag will expand.
B
The bag will shrink.
C
The bag will remain the same size.
D
The bag will allow air to enter.
5

Which conditions are equal to STP?

A
30°C, 100 kPa
B
–273.15°C, 1 atm
C
0°C, 760 mmHg
D
25°C, 101.325 kPa
6

If the atmospheric pressure on the top of a mountain is 0.2396 atm, what is the pressure in kilopascal (kPa)?

A
2.365 ´ 10–3 kPa
B
24.28 kPa
C
182.1 kPa
D
422.9 kPa
7

Which sequence describes the result of increasing the number of gas particles in a container?

A
fewer collisions ® lower collision force ® lower pressure
B
more collisions ® lower collision force ® lower pressure
C
fewer collisions ® greater collision force ® higher pressure
D
more collisions ® greater collision force ® higher pressure
8

If the pressure of a gas is 2.42 atm, what is its pressure in kPa?

A
0.00318 kPa
B
0.0239 kPa
C
245 kPa
D
1,840 kPa
9

Which is the SI unit for pressure?

A
Pa
B
Torr
C
psi
D
inHg
10

How many atm are in 1,520 mmHg?

A
0.500 atm
B
2.00 atm
C
15.0 atm
D
203 atm

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