Unit 3 Thou Shall not Forget

Front

What are the intermolecular forces from weakest to strongest?

Back

London Dispersion (not always), dipole-dipole, hydrogen bonding, ion-dipole.

Front

What happens to London Dispersion forces as a molecule gets larger?

Back

The force gets stronger as the molecule is larger due to a larger electron cloud, making it more polarizable.

Front

What type of molecules contain dipole-dipole forces?

Back

All polar molecules contain dipole-dipole forces, which get stronger as the molecule is more polar.

Front

What is a hydrogen bond?

Back

A hydrogen bond occurs between a NOF (Nitrogen, Oxygen, Fluorine) in one compound and a hydrogen that’s already bonded to a NOF in another compound.

Front

How do boiling point and melting point relate to intermolecular forces?

Back

Boiling point and melting point increase as intermolecular forces increase.

Front

How do vapor pressure and volatility relate to intermolecular forces?

Back

Vapor pressure and volatility decrease as intermolecular forces increase.

Front

What are the characteristics of molecular solids?

Back

Molecular solids have low melting/boiling points and do not conduct electricity.

Front

What are the characteristics of ionic solids?

Back

Ionic solids have high melting/boiling points, do not conduct electricity as a solid, but conduct as a liquid or in aqueous solution.

Front

What are covalent network solids?

Back

SiO2 (quartz) and diamonds are covalent network solids with very high boiling/melting points.

Front

What happens when a molecular solid melts or boils?

Back

The intermolecular forces between the molecules break, not the covalent bonds.