Chapter 1.1: States of matter and kinetic particle theory

Question 1

What is matter?

Answer 1

Matter is a substance that has mass and occupies space.

Question 2

What are the properties of boiling?

Answer 2

occurs only at boiling point
occurs throughout the liquid
occurs rapidly

Question 3

What are the properties of evaporation?

Answer 3

occurs at temperatures below boiling point
occurs only at the surface of liquids
occurs slowly

Question 4

What is sublimation?

Answer 4

It is a process by which a solid’s particles overcome the forces of attraction between other particles and escape directly to the vapour phase

Question 5

What occurs when a a solid is melting to form a liquid or when a liquid is boiling to form a gas?

Answer 5

Temperature remains constant, heat energy is absorbed by the particles to overcome the forces of attraction between particles.

Question 6

What occurs when a gas is condensing to form a liquid or when a liquid is freezing to form a solid?

Answer 6

Temperature remains constant, particles release heat to the surroundings . Forces of attraction become strong enough to pull particles closer together until they assume the arrangement of liquid particles. (swap words around for solids and liquids freezing)