ch 4 states of matter review

Front

What is evaporation?

Back

Evaporation is the process by which molecules at the surface of a liquid gain enough energy to enter the gas phase, occurring at temperatures below the boiling point.

Front

What is a gas?

Back

A gas is a state of matter that does not have a definite shape or volume, and its particles are far apart and move freely.

Front

What does temperature represent in a sample of matter?

Back

Temperature represents the average kinetic energy of all particles in a sample of matter.

Front

What is a change of state?

Back

A change of state refers to the transformation of a substance from one physical state (solid, liquid, gas) to another, not a change in chemical form.

Front

How do particles in a solid move compared to particles in a gas?

Back

Particles in a solid move slower than the particles that make up a gas.

Front

What is boiling?

Back

Boiling is the rapid vaporization of a liquid that occurs when it reaches its boiling point, where the vapor pressure equals the atmospheric pressure.

Front

What is condensation?

Back

Condensation is the process by which gas turns into a liquid when it loses energy and cools down.

Front

What is sublimation?

Back

Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the kinetic molecular theory?

Back

The kinetic molecular theory explains the behavior of gases, stating that gas particles are in constant motion and that their collisions with each other and the walls of their container are elastic.