Boiling and Vapor Pressure

Is the pressure exerted by its vapor when in equilibrium with its liquid or solid

• Surface Tension

• Viscosity

• Vapor Pressure

• Boiling Point

Is the amount of heat required to vaporize one mole of a substance at its boiling point.

• Heat of Vaporization

• Amorphous Solids

• Crystalline Solids

• Heat of Fusion

It is a boiling point or the substance changes from a liquid to a gas

• Freezing

• Melting

• Condensation

• Vaporization

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

5. The boiling point of a pure substance is defined as the temperature at which

• the kinetic energy of the molecules begins to increase

• the vapor pressure equals the external pressure

• the liquid phase can be completely evaporated

• the molecules of the substance break apart

Tags

NGSS.MS-PS1-4

Using your knowledge of chemistry and the info in Ref Table H, which statement concerning propanone and water at 50°C is true? *vp= vapor pressure *imf= intermolecular forces

• propanone has a higher vp and stronger imf than water

• propanone has a higher vp and weaker imf than water

• propanone has a lower vp and stronger imf than water

• propanone has a lower vp and weaker imf than water

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

• ethanoic acid

• propanone

• ethanol

• water

What is the normal boiling point of ethanoic acid?

• 52°C

• 101.3°C

• 55°C

• 117.9°C

As the atmospheric pressure increases, the temperature at which water boils in an open vessel

• decreases

• increases

• remains the same

• smiles

6. When the vapor pressure of water is 30kPa, the temperature of the water is

• 20°C

• 70°C

• 40°C

• 100°C

Tags

NGSS.MS-PS1-4

Based on Reference Table H, which sample has the highest vapor pressure?

• water at 20°C

• ethanol at 50°C

• water at 80°C

• ethanol at 65°C