Particle motion and pressure in gases

14* Some air is in a closed container.

The table shows its pressure at two temperatures.

Explain how the pressure of the air changes.

Use ideas about the movement of particles.

A sealed rigid container of air is in a room at 20 °C. The container is then placed in a refrigerator at 4 °C.

Which row explains what happens to the speed of the air molecules and the pressure inside the

Two rooms have the same fixed volume. They contain identical gases at the same pressure.

Room H is at a higher temperature than room L.

Which statement is correct?

A The particles are moving at the same speed in both rooms.

B The particles are moving faster in room H.

C The particles are moving faster in room L.

D The particles are not moving in either room.

Two rooms have the same fixed volume. They contain identical gases at the same pressure.

Room H is at a higher temperature than room L.

Which statement is correct?

A The particles are moving at the same speed in both rooms.

B The particles are moving faster in room H.

C The particles are moving faster in room L.

D The particles are not moving in either room.

A ball is inflated with air.

In which environment will the air inside the ball have the highest pressure?

A In a refrigerator (3 °C)

B In a house (18 °C)

C Outside on a cold day (5 °C)

D Outside on a warm day (21 °C)

This apparatus is used to measure the pressure of a fixed volume of gas.

When the temperature of water increases what happens to the pressure and the speed of the gas particles?

A sealed boiling tube contains gas.

The boiling tube is heated.

What happens?

A The particles in the gas evaporate.

B The particles in the gas expand.

C The particles in the gas move faster.

D The particles in the gas move slower.