Changes of State

Give an example of sublimation.

Dry ice is an example. dry ice is solid carbon dioxide that changes directly into a gas.

True or False? At its freezing point, the particles of a solid are vibrating so fast that they break free from their fixed positions.

False

In condensation does the gas lose or gain thermal energy and does the movement of particles increase or decrease?

It loses thermal energy and the movement of particles decreases.

In freezing does the liquid lose or gain thermal energy and does the movement of particles increase or decrease?

It loses thermal energy and the movement of particles decreases.

When condensation occurs, does a gas lose or gain thermal energy?

It loses thermal energy.

Why is the boiling point of water lower in the mountains than it is at sea level?

The pressure of the air causes the boiling point to change. lower air pressure decreases the boiling point of water. High air pressure increases air pressure.

In melting does the solid lose or gain thermal energy and does the movement of particles increase or decrease?

Thermal energy gains and the movement of particles increase.

In sublimation does the solid lose or gain thermal energy and does the movement of particles increase or decrease?

Thermal energy gains and the movement of particles increase.

In vaporization does the liquid lose or gain thermal energy and does the movement of particles increase or decrease?

Thermal energy gains and the movement of particles increase.

True or False? Condensation is the opposite of vaporization.

True

When does vaporization take place?

When the particles in a liquid gain enough thermal energy to form a gas.

Gas bubbles forming throughout the liquid is called?

boiling

The change in state from gas to liquid is called?

condensation

Liquid changing to gas only at the surface is called?

evaporation

The change of state from liquid to solid is?

freezing

each liquid boils at a certain temperature called?

its boiling point

The change of state from a solid to a liquid is called?

melting

What are the 2 changes of state between a solid and a liquid?

melting and freezing

During what do the particles of a solid do not pass through the liquid state as they form a gas?

sublimation

What is the only change of state between a solid and gas?

sublimation

In most pure substances, melting occurs at a certain temperature called?

the melting point

The change from a liquid to a gas is called?

vaporization

What are the 4 changes of state between a liquid and gas?

vaporization, evaporation, boiling, and condensation