Understanding Boiling in a Vacuum Chamber

What happens to the water in the vacuum chamber as the pressure decreases?

• The water remains unchanged.

• The water evaporates completely.

• The water starts to boil.

• The water freezes.

Why does water boil at a lower pressure without adding heat?

• Because the water is heated from below.

• Because the external pressure is increased.

• Because the external pressure is reduced.

• Because the water is stirred vigorously.

What allows water molecules to escape more easily in a vacuum?

• Larger container size.

• Higher water temperature.

• Decreased external pressure.

• Increased external pressure.

What happens to the temperature of the water as the faster molecules escape?

• The temperature fluctuates.

• The temperature decreases.

• The temperature remains constant.

• The temperature increases.

Why are the remaining water molecules cooler after some escape?

• They have absorbed more energy.

• They are moving faster.

• They are moving slower.

• They have gained mass.