Intermolecular Forces

IMFs

100

Put the IMFs in order from weakest to strongest.

London dispersion, dipole-dipole, hydrogen bonding

200

What do you call a partial charge on a covalent molecule?

Dipole

300

Which IMF(s) does NH₃ have? 

Hydrogen bonding, dipole-dipole, and london dispersion forces

Physical Characteristics

100

How does boiling point relate to the strength of the IMF?

Molecules with stronger IMFs (like H bonding) have higher boiling points.

200

How are polarity and IMFs related?

Polar molecules have the strongest IMFs and nonpolar molecules have the weakest IMFs.

300

What do happens to the IMFs between molecules when they melt from a solid to a liquid?

Some of the IMFs between the molecules are broken as the substance becomes a liquid.

Modeling

100

Draw and label the IMFs between two molecules of Br₂.

London dispersion forces.

200

Draw and label the strongest intermolecular force between two molecules of HCN.

Dipole-dipole forces. Must include the dipoles

300

Draw and label the strongest intermolecular force between two molecules of HF.

HF does hydrogen bonding and should show dipoles.