Boiling and Vapor Pressure

According to Reference Table H, what is the vapor pressure of propanone at 45°C?

• 22 kPa

• 70 kPa

• 33 kPa

• 98 kPa

Which model represents a LOWER Vapor Pressure?

• A

• B

Tags

NGSS.HS-PS3-2

What is the main condition for vapor-liquid equilibrium between two phases?

• Identical temperature only

• Identical pressure and concentration

• Departure from equilibrium proportional to mass transfer rate

• Phases must have the same volume

According to Raoult's Law, the partial pressure of a component in a vapor phase is directly proportional to:

• Temperature

• Mole fraction of the component in the liquid phase

• System volume

• System pressure

In a benzene-toluene mixture, as boiling continues, the mole fraction of benzene in the liquid phase (xA) moves:

• Toward zero

• To the right of the boiling point line

• Toward the bubble point line

• To the left since yA is richer in benzene

Tags

NGSS.HS-PS3-4

Relative volatility (α) between two components in a mixture is a measure of:

• The composition difference in the liquid phase only

• Separation difficulty based on vapor-liquid equilibrium

• The temperature of the system

• The energy required for separation

In steam distillation, which of the following is NOT a characteristic advantage?

• Lower operating temperatures

• Prevention of decomposition of high-boiling components

• Reduced pressure requirements

• Enhanced separation for non-volatile impurities

Process that separates substances in a solution based on their boiling points.

• Distillation

• Filtration

• Precipitation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

The type of vaporization that takes place throughout a solution.

• Evaporation

• Boiling

• Condensation

• Sublimation

The amount of energy that a substance must absorb in order to change from a liquid to a gas.

• Heat of Fusion

• Heat of Evaporation

• Heat of Vaporization

• Kinetic Theory

• Vapor Pressure

Tags

NGSS.MS-PS1-4