How does the molar mass of molecules affect the boiling points?

Question

e.g MOlar masses
HI-->127.9
HF--->20.07
HCl---> 36.45

Boling points
HI-->-35.55
HF---> 20
HCl--->-114.17

can it be said that except for HF molecule, as molar mass increases the boling points alos increases

Answer 1

I think the boiling point you have for HCl is out. See, for example, http://www.transtutors.com/chemistry-homework-help/S-and-P-block-elements/hydrides-of-halogens.aspx

However, your conclusion is correct that boiling point increases, generally, as molar mass increases. HF is the one out of line because of H bonding.