What determines the phase of matter?
Clearly, the phase of the matter, whether it's a solid, a liquid, or a gas, is a function of intermolecular force.........
Non-polar covalent molecules clearly have a negligible degree of intermolecular attraction. Consider the boiling points of dihydrogen, dixoygen, dinitrogen. On the other hand, polar molecules have some degree of intermolecular attraction in that the dipoles can align along electrostatic lines.
You can illustrate this tendency by considering the boiling points of the bimolecular halides,
Non-molecular species, which have no discrete molecular boundaries, tend to have high melting and boiling points. You will have to find the diagrams yourself. But consideration of the degree of