Vapor Pressure

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

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

• ethanoic acid

• ethanol

• propanone

• water

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

Tags

NGSS.MS-PS1-4

What does a manometer measure?

• condensation rates

• evaporation rates

• boiling point

• vapor pressure

• volatility

Liquids with weak intermolecular forces

• contain a lot of kinetic energy

• easily evaporate

• cannot diffuse

• freeze easily

• are probably volatile

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-5

If there are more gases, then vapor pressure will

• increase

• decrease

• stay the same

• cannot tell

if the temperature increases, then vapor pressure will

• increase

• decrease

• cannot tell

• stay the same

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

• 28 ^oC

• 100^oC

• 111^oC

• 125^oC

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

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