Changes of State

Question 1

matter can exist in any of the 3 states of matter depending on its…….

Answer 1

temperature

Question 2

it can change from one state to another by………

Answer 2

heating or cooling as this causes a change in kinetic energy and arrangement of particles

Question 3

What happens when a solid is heated?

Answer 3

-the particles gain kinetic energy, move increasingly faster and further apart causing the attraction between them to become weaker turning it to a liquid

Question 4

What happens when a gas is cooled?

Answer 4

-the particles lose kinetic energy, move slower and slower and closer together causing the forces of attraction between them to strengthen changing it to a liquid

Question 5

Name some examples of compounds that sublime

Answer 5

Solid carbon dioxide (dried ice)
Moth balls
Iodine
Ammonium chloride

Question 6

What is boiling?

Answer 6

boiling occurs at a specific temperature, it takes place throughout the liquid

Question 7

What is evaporation?

Answer 7

evaporation can take place at a range of temperatures lower than the boiling point, it takes place only on the surface of the liquid