Vapor Pressure and Intermolecular forces

Front

What is vapor pressure?

Back

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature.

Front

How does temperature affect vapor pressure?

Back

As temperature increases, vapor pressure increases due to more molecules having enough energy to escape the liquid phase.

Front

Rank the following intermolecular forces from strongest to weakest: covalent bond, hydrogen bond, dipole-dipole attraction, London forces.

Back

Covalent bond > Hydrogen bond > Dipole-dipole attraction > London forces.

Front

What type of intermolecular force is present in water?

Back

Water exhibits hydrogen bonding due to the presence of O-H bonds.

Front

Does HCl have hydrogen bonding?

Back

No, HCl does not have hydrogen bonding because it does not have a hydrogen atom bonded to a highly electronegative atom.

Front

What is the boiling point of a substance related to vapor pressure?

Back

The boiling point is the temperature at which the vapor pressure of a liquid equals the external pressure.

Front

What is the vapor pressure of propanone at 50°C?

Back

83 kPa.

Front

What happens to vapor pressure when a liquid is heated?

Back

The vapor pressure increases as the liquid is heated.

Front

What is the relationship between intermolecular forces and boiling point?

Back

Stronger intermolecular forces result in higher boiling points.

Front

What is a London dispersion force?

Back

London dispersion forces are weak intermolecular forces arising from temporary dipoles in molecules.