Question

Which of the following has the largest predicted boiling point and which has the smallest? Explain.
a) K2O b) O2 c) NH3 d) HCl

Answer 1

BP and other physical properties are dependent on the type or intermolecular bonding (e.g london dispersion) between adjacent molecules/formula units.

Determine the type of bonds within the substance (e.g. polar covalent, ionic) which will be tell what type of bonding exists between the molecules.