Mastery 7.1: Vapor Pressure & Phase Changes

What is the vapor pressure of water at 90.°C?

• 40. kPa

• 68 kPa

• 94 kPa

• 150. kPa

Which compound has the strongest intermolecular forces?

• HF

• HCl

• HBr

• HI

Given the equation: I₂(s) → I₂(g) Which phrase describes this change?

• endothermic chemical change

• endothermic physical change

• exothermic chemical change

• exothermic physical change

Which physical change is endothermic?

• CO₂(s) → CO₂(g)

• CO₂(ℓ) → CO₂(s)

• CO₂(g) → CO₂(ℓ)

• CO₂(g) → CO₂(s)

Which equation represents sublimation?

• Hg(ℓ) → Hg(s)

• H₂O(s) → H₂O(g)

• NH₃(g) → NH₃(ℓ)

• CH₄(ℓ) → CH₄(g)

Tags

NGSS.HS-PS3-4

At which temperature is the vapor pressure of ethanol equal to 80. kPa?

• 48°C

• 73°C

• 80.°C

• 101°C

Hydrogen bonding is a type of

• strong covalent bond

• weak ionic bond

• strong intermolecular force

• weak intermolecular force

Which liquid has the highest vapor pressure at 75°C?

• ethanoic acid

• ethanol

• propanone

• water

What is the boiling point of propanone if the pressure on its surface is 48 kilopascals?

• 25°C

• 30.°C

• 35°C

• 40.°C

According to Reference Table H, what is the boiling point of ethanoic acid at 80 kPa?

• 28°C

• 100°C

• 111°C

• 125°C