Phases of Matter

Question 1

Kinetic Theory

Answer 1

Explanation of how particles of matter behave

1) All matter is composed of small particles (Atoms, molecules, and ions.)
2) These particles are in constant, random motion.
3) These particles are colliding with each other and the walls of their container.

Question 2

Melting Point

Answer 2

Temperature at which a solid begins to become liquid.

Question 3

Heat of Fusion

Answer 3

Amount of energy required to change a substance from the solid phase to the liquid phase at it’s melting point.

Question 4

Boiling Point

Answer 4

Temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid

Question 5

Heat of Vaporization

Answer 5

Amount of energy required for the liquid at it’s boiling point to become a gas

Question 6

Diffusion

Answer 6

Spreading of particles throughout a given volume until they are uniformly distributed.

Question 7

Plasma

Answer 7

Matter consisting of positively and negatively charged particles.

Question 8

Thermal Expansion

Answer 8

An increase in the size of a substance when the temperature is increased.