Gas Pressure Problems

How can we increase the gas pressure inside a sealed container?

• Increase the number of particles inside the container
• Increase the temperature
• Decrease the volume of the container
• All of these

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

• The pressure will increase

• The pressure will decrease

• The pressure will remain constant

• The pressure will equalize

Tags

NGSS.MS-PS1-4

In what direction(s) does air exert pressure?

• everywhere
• no where
• there is no pressure
• downward

A car tyre runs over a nail which makes a hole in it. The air in the tyre leaks out. Why does the air leave the tyre?

• The pressure inside the tyre is greater than the pressure outside.

• The pressure inside the tyre is less than the pressure outside.

• The temperature inside the tyre is greater than the temperature outside.

• The temperature inside the tyre is less than the temperature outside.

A driver of a car measures the pressure of the air in the tyres. He measures the pressure again

after a long journey. The pressure reading has increased.

Which row states what has happened to the speed of the air molecules and the temperature of

the air in the tyres?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the

volume of the gas is kept constant. How does this change affect the kinetic energy of the molecules and the pressure on the walls of the container?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Air is trapped in a cylinder by a piston.

The piston is pushed inwards and the volume of the air is reduced.

The temperature of the trapped air remains constant.

Which row describes how the average speed of the air molecules and the average distance between them changes?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

Some gas in a sealed plastic bag is cooled.

How do the gas molecules behave when this happens?

• A They move more quickly and become closer together.

• B They move more quickly and become further apart.

• C They move more slowly and become closer together.

• D They move more slowly and become further apart.

Tags

NGSS.MS-PS1-4

The diagram represents the molecules of a gas in a closed container of constant volume. What happens to the molecules when the gas is heated?

• A They expand.

• B They hit the walls less often.

• C They move further apart.

• D They move more quickly.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

A sealed gas cylinder is left outside on a hot, sunny day. What happens to the average speed of the molecules and to the pressure of the gas in the cylinder as the temperature rises?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5