Intermolecular Forces

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Archana Biju 1G
Posts: 29
Joined: Fri Sep 28, 2018 12:18 am

Intermolecular Forces

Postby Archana Biju 1G » Mon Nov 26, 2018 11:09 pm

Why does CHI3 have a higher melting point than CHF3? Does it have to do with electronegativity?

Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Re: Intermolecular Forces

Postby Tiffany_Cacy_3D » Mon Nov 26, 2018 11:23 pm

While Fluorine is a very electronegative atoms, this electronegativity creates very strong Intramolecular bonds which make the molecule itself very hard to break apart. When you are talking about boiling point however the bonds between molecules, or the intermolecular bonds, are what you actually need to look at because the strength of those determines the boiling point. In this case I is a bigger molecule than F and has more electrons which would also make it more polarizable, and in turn, increasing the boiling point.


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