Phase Changes

Front

What is evaporation?

Back

Evaporation is the phase change between liquid and gas that occurs below the boiling point without the addition of heat, taking place at the surface of a liquid.

Front

What happens to the motion of particles when matter is heated?

Back

When matter is heated, the particles move faster.

Front

What happens to the attraction between particles in a solid when it is heated?

Back

The particles become less attracted to each other.

Front

What is vaporization?

Back

Vaporization is the phase change from a liquid to a gas that occurs when the liquid reaches its boiling point, happening throughout the liquid, not just at the surface.

Front

What happens to the motion of particles when matter is cooled?

Back

When matter is cooled, the particles will slow down.

Front

Define condensation.

Back

Condensation is the phase change from a gas to a liquid, occurring when gas particles lose energy and come together.

Front

What is the boiling point?

Back

The boiling point is the temperature at which a liquid turns into a gas throughout the entire liquid.

Front

Explain the difference between evaporation and boiling.

Back

Evaporation occurs at any temperature below the boiling point and only at the surface, while boiling occurs at the boiling point and throughout the liquid.

Front

What is the role of heat in phase changes?

Back

Heat can cause particles to gain energy, leading to phase changes such as melting, evaporation, or boiling.

Front

What is melting?

Back

Melting is the phase change from solid to liquid, occurring when a solid gains enough heat energy to overcome the attraction between its particles.