State changes - interconversions

Question 1

solid to liquid

Answer 1

melting

Question 2

liquid to solid

Answer 2

freezing

Question 3

liquid to gas

Answer 3

boiling or evaporating

Question 4

what is the difference between boiling and evaporating?

Answer 4

Boiling happens all the way through while evaporation only occurs on the top layer.

Question 5

gas to liquid

Answer 5

condensation

Question 6

gas to solid

Answer 6

sublimation

Question 7

solid to gas

Answer 7

sublimation

Question 8

how are solids held together?

Answer 8

by strong chemical bonds

Question 9

how are liquids held together?

Answer 9

by attractive forces

Question 10

are gases held together?

Answer 10

no

Question 11

how do you overcome the strong chemical bonds in a solid?

Answer 11

melt the solid

Question 12

how do you overcome the attractive forces in liquids?

Answer 12

boil the liquid

Question 13

what is melting used for?

Answer 13

to break the bonds between particles

Question 14

what is boiling used for?

Answer 14

to break the attractive force between particles.

Question 15

what diffuses faster: ammonia or HCl?

Answer 15

ammonia - it will move further in the same time period.

Question 16

when ammonia and hydrogen chloride gas meet in a tube what do they produce?

Answer 16

ammonium chloride