What are the factors that determine the boiling points of different substances?

[babbagee]

How do i find out which substance has a higher boiling point.

Which substance has the higher boiling point? Explain.

a.) LiCl or HCl
b.) NH₃ or PH₃
c.) Xe or I₂

I also have a question on vaporization

Which forces oppose vaporization of each substance?
a.) hexane
b.) water
c.) SiCl₄

 

[garytse86]

is this for homework?

 

[BLUE_CHIP]

Look at the intermolecular bonding (VdW, H-bonds, etc.)

and for part 2:

the same.

this is not for homework u have to give it a go b4