How can I find the boiling point of a substance, given the heat of vaporization?

Answer 1

The free energy change (delta G) of boiling is zero.

This boils (excuse the pun) down to

T = delta H/delta S.

So all you have to do is to find out the entropy change of vaporisation, make sure that the units are the same, and divide one by the other. This will give the boiling point in Kelvin.