States of Matter and Changes

Flashcards summarizing key concepts about the states of matter, changes of state, and kinetic particle theory.

Melting

The process of changing from a solid to a liquid.

Boiling

The process of changing from a liquid to a gas throughout the liquid.

Condensation

The process of changing from a gas to a liquid.

Diffusion

The random movement of particles from an area of high concentration to an area of low concentration.

Physical change

A change that does not create a new product and is reversible.

Chemical change

A change that creates a new product and is not reversible.

Sublimation

The process of changing directly from a solid to a gas without becoming a liquid.

Kinetic Particle Theory

The theory that states that particles are in constant motion and that this motion increases with temperature.

Evaporation

The process of turning from liquid into vapor, occurring at the surface of the liquid.

Impurities

Substances mixed with a pure material that can affect properties like melting and boiling points.

Energy usage in state changes

Energy is used to break bonds and overcome attractive forces between molecules.

Arrangement of particles in solids

Particles are regularly and closely packed together.

Arrangement of particles in liquids

Particles are irregular but still close together.

Arrangement of particles in gases

Particles are far apart and move freely and randomly.