Fall 24 Chp 10: Kinetic Molecular Theory: Particle Motion

Front

What is it called when a substance loses or gains energy to change from one state of matter to another?

Back

Phase change

Front

Phase changes are ___________________ because no new substance is formed.

Back

Physical changes

Front

What is the first assumption of the Kinetic Theory of Matter?

Back

Matter consists of molecules and atoms

Front

A Gas is a state of matter that has _____________________________________________________

Back

No definite size or shape

Front

A phase change when solid turns directly into a gas is called?

Back

Sublimation

Front

What is the definition of kinetic energy?

Back

The energy an object has due to its motion.

Front

What happens to the particles in a substance when it is heated?

Back

The particles move faster and spread apart.

Front

What is the relationship between temperature and kinetic energy?

Back

As temperature increases, the average kinetic energy of the particles increases.

Front

What is an endothermic process?

Back

A process that absorbs energy from its surroundings.

Front

What is an exothermic process?

Back

A process that releases energy to its surroundings.