Re-assessment Assignment Unit 4 Part 1

Liquids with weak intermolecular forces

• contain a lot of kinetic energy
• easily evaporate
• cannot diffuse
• freeze easily

Why does a gas with a lower vapor pressure have a higher boiling point?

• the molecules need more energy to break free of their attractions to other molecules and change phase from liquid to gas

• the forces of attraction between the molecules are strong

• the substance has low volatility

• all of the answers are correct

Which particle level model represents the pure substance with STRONGER intermolecular attractions?

• 
• 

Label the phase diagram.

d

e

f

g

c

b

a

gas

critical pressure

triple point

solid

liquid

critical temperature

critical point

Phase change going from Liquid to Solid...

• Melting

• Freezing

• Condensation

• Sublimation

Phase change going from a Gas to a Liquid...

• Sublimation

• Deposition

• Ionization

• Condensation

Phase change going from a Liquid to a Gas...

• Vaporization

• Deposition

• Condensation

• Melting

Phase change going from a Solid to a Gas...

• Deposition

• Sublimation

• Condensation

• Recombination

Phase change going from a Solid to a Liquid...

• Freezing

• Condensation

• Melting

• Sublimation

Phase change going from a Gas to a Solid...

• Deposition

• Sublimation

• Condensation

• Vaporization