Unit 10&11 Review

The weaker the intermolecular forces of a substance the _____________ the boiling point

• higher

• lower

Liquids with weak intermolecular forces

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

According to the reference table, what is the boiling point of ethanoic acid at 80 kPa?

• 28 ^oC

• 100^oC

• 111^oC

• 125^oC

Which liquid has the highest vapor pressure at 75^oC?

• ethanoic acid

• ethanol

• propanone

• water

At which temperature is the vapor pressure of ethanol equal to the vapor pressure of propanone at 35^oC?

• 35^oC

• 60^oC

• 82^oC

• 95^oC

What is vapor pressure?

• the force of the gas above a liquid

• the force of a gas below a liquid

• the force of a liquid below a gas

• boiling point

• evaporation

Why do sealed jars with liquid in them reach equilibrium?

• evaporation rates equal condensation rates

• all the liquid evaporates

• all the liquid condenses

• there is an equal amount of liquid and gas

• they do no not reach equilibrium

Do unsealed jars with liquid in them reach equilibrium?

• evaporation rates equal condensation rates

• all the liquid evaporates

• all the liquid condenses

• there is an equal amount of liquid and gas

• they do no not reach equilibrium

if the temperature increases, then vapor pressure will

• increase

• decrease

• cannot tell

• stay the same

If you wanted to know the boiling point at STP, you would find where the curve intersects with

• 101.3kpa

• 1 atm

• 273K

• the y axis

• you cannot tell