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Polarity and Boiling Point

Posted: Sat Nov 24, 2018 8:28 pm
by Jonathan Pai 2I
Why does higher polarity lead to higher boiling point???

Re: Polarity and Boiling Point

Posted: Sat Nov 24, 2018 9:05 pm
by Ariel Cheng 2I
Molecules with higher polarity have greater dispersion forces and therefore stronger dipole-dipole interactions. This greater intermolecular attraction force leads to a higher boiling point. This explains why water (with all its hydrogen bonds) has a high boiling point.

Re: Polarity and Boiling Point

Posted: Sat Nov 24, 2018 11:40 pm
by yea-lyn pak_1G
Since a higher polarity means the atom/molecule has a stronger negatively charged end and a stronger positively charged end, this leads to greater dipole-dipole interactions between atoms/molecules. Thus, it's harder to pull apart the atoms or molecules and requires a higher boiling point.

Re: Polarity and Boiling Point

Posted: Sun Nov 25, 2018 11:29 pm
by Michelle Nwufo 2G
Following up with this question, why does high covalent character mean high boiling point?