Polarity and Boiling Point

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Jonathan Pai 2I
Posts: 121
Joined: Fri Sep 28, 2018 12:27 am

Polarity and Boiling Point

Postby Jonathan Pai 2I » Sat Nov 24, 2018 8:28 pm

Why does higher polarity lead to higher boiling point???

Ariel Cheng 2I
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: Polarity and Boiling Point

Postby Ariel Cheng 2I » Sat Nov 24, 2018 9:05 pm

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.

yea-lyn pak_1G
Posts: 30
Joined: Fri Sep 28, 2018 12:18 am

Re: Polarity and Boiling Point

Postby yea-lyn pak_1G » Sat Nov 24, 2018 11:40 pm

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.

Michelle Nwufo 2G
Posts: 61
Joined: Fri May 18, 2018 3:00 am

Re: Polarity and Boiling Point

Postby Michelle Nwufo 2G » Sun Nov 25, 2018 11:29 pm

Following up with this question, why does high covalent character mean high boiling point?


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