Vap Pre DOL

Which substance has the weakest intermolecular forces?

• Substance A, boiling point of 75 °C

• Substance B, boiling point of 105 °C

• Substance C, boiling point of 25 °C

• Substance d, boiling point of 45 °C

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

• higher

• lower

As pressure decreases, boiling point___

• decreases
• increases
• decreases then increases
• increases then decreases

Liquids with weak intermolecular forces

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

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

What is the normal boiling point of water

• 0^oC

• 100^oF

• 50^oC

• 100^oC

When you increase your altitude, the air pressure 

• increases
• decreases
• stays the same

Which model represents STRONGER Intermolecular Forces?

• A

• B

________is the instrument used to measure air pressure.

• barometer
• thermometer
• mercury
• watch