AnswersCR03101 ChemistryUnit Test

Gases Answers

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The diagram shows the movement of particles from one end of the container to the opposite end of the container.Which event is most likely occurring?

Question illustration
A
diffusion because particles move from regions of high concentration to regions of low concentration
B
diffusion because particles move from regions of low concentration to regions of high concentration
C
effusion because there is a movement of a gas through a small opening into a larger volume
D
effusion because there is a movement of a gas through a large opening into a smaller volume
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The table describes a gas stored in four different containers. Properties of Stored GasContainerProperties1· Low number of collisions with container walls· Medium average kinetic energy· Large number of particles2· Large number of collisions with container walls· Medium average kinetic energy· Small number of particles with little spaces between them3· Large number of collisions with container walls· High average kinetic energy· Large number of particles with large spaces between them4· Few collisions with container walls· Low average kinetic energy· Small number of particlesWhich container has gas stored at the highest temperature?

A
1
B
2
C
3
D
4
3

A graph of gas pressure versus the number of particles in a container is a straight line. Which other relationship will have a similar graph?

A
volume versus pressure, because they are also directly proportional
B
volume versus temperature, because they are also directly proportional
C
volume versus pressure, because they are also inversely proportional
D
volume versus temperature, because they are also inversely proportional
4

Which is an example of the kinetic-molecular theory not holding true for a gas?

A
The average kinetic energy of particles depends only on the temperature.
B
The particles in a gas travel in straight lines in a continuous, random motion.
C
The attraction between particles causes a gas to condense at low temperatures.
D
The particles in a gas make up a small portion of the total volume of the gas.
5

Which statement describes effusion?

A
It occurs when a gas passes through a tiny hole.
B
It occurs when a liquid passes through a tiny hole.
C
It occurs when gas molecules disperse throughout a container.
D
It occurs when a liquid disperses throughout a container.
6

If gas particles start colliding with the walls of their metallic container with increased force, what is their direct effect?

A
lower gas pressure
B
higher gas pressure
C
lower volume of gas
D
higher volume of gas
7

Which statement best describes the compressibility of a gas?

A
Increasing the temperature of a gas decreases the pressure.
B
Increasing the temperature of a gas increases the pressure.
C
Increasing the pressure on a gas decreases the volume.
D
Increasing the pressure on a gas increases the volume.
8

Which statement best describes the collisions of gas particles according to the kinetic-molecular theory?

A
When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with no gain or loss of energy.
B
As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with no gain or loss of energy.
C
When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with a loss of energy.
D
As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with a loss of energy.
9

Which statement about gases is true?

A
They are made up of particles that always move very slowly.
B
They are made up of particles that travel in a curved path when in motion.
C
They are made up of hard spheres that vibrate quickly in stationary positions.
D
They are made up of hard spheres that are in random motion.
10

According to the kinetic-molecular theory, the collision between two ideal gas particles is a result of

A
neither attraction nor repulsion.
B
repulsion from the wall of the container.
C
repulsion from other gas particles.
D
attraction between the two particles.

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