Question

compare and contrast dipole-dipole attractions with London Dispersion Forces

Answer 1

Dipole-Dipole forces only occur in molecules that are polar. Such as ICl. Since there is partial positive sides and partial negative side in the molecule them there is attraction between other molecule's partial charges.

London dispersion forces are forces that occur only in molecules that are nonpolar such as CF4 or Cl2. This is the weakest force because there is no attraction between the molecules except for very quick instances when in the molecule there is more electrons on one side of the molecule than the other side.This causes another molecular to also have an imbalance in winch creates an attraction.