polarizability

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Adam Kramer 1A
Posts: 67
Joined: Sat Aug 24, 2019 12:15 am

polarizability

Postby Adam Kramer 1A » Sun Nov 10, 2019 11:19 am

What causes different polarizability of molecules, and why does that affect a molecule being solid or liquid at room temperature?

alexfwang3g
Posts: 50
Joined: Thu Jul 11, 2019 12:16 am

Re: polarizability

Postby alexfwang3g » Sun Nov 10, 2019 11:22 am

The respective sizes of the molecules usually determines the molecule's polarizability - its ability to be polarized. Larger elements such as I usually are easily polarized instead of smaller elements like F.

Polarizability doesn't necessarily determine the state of the molecule, but instead it is the bonds between the molecules, whether it be hydrogen, dipoledipole etc.. that determines it.

Rebecca Epner 4A
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Joined: Sat Aug 17, 2019 12:18 am

Re: polarizability

Postby Rebecca Epner 4A » Sun Nov 10, 2019 11:26 am

Polarizability also explains the likelyhood of a certain atom to become distorted. This is why larger atoms have a higher polorizability

Frederick Keith_4C
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Joined: Thu Sep 26, 2019 12:19 am

Re: polarizability

Postby Frederick Keith_4C » Sun Nov 10, 2019 12:01 pm

Polarizability is a measure of how easily distorted an electron is by an electric field. Larger atoms with smaller negative charges are easily polarizable and can have stronger Van Der Waals interactions.

Areena H 2K
Posts: 69
Joined: Wed Dec 05, 2018 12:18 am

Re: polarizability

Postby Areena H 2K » Sun Nov 10, 2019 12:04 pm

The size and charge of an ion determines its polarizability. The larger anion has a larger electron cloud that can be distorted and also has a lot of electrons shielding it from its nucleus therefore if another cation is close by its strong nuclear pull is going to attract the anions large electron cloud towards itself and is going to distort it.

Louise Lin 2B
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Joined: Sat Aug 17, 2019 12:15 am

Re: polarizability

Postby Louise Lin 2B » Sun Nov 10, 2019 12:22 pm

Polarizablility increases generally when volume occupied increases. This means, as a periodic trend, it increases down a group, but decreases across a period. Polarizability determines what kinds of bonds the atom will form, which then determines the state of the molecule.

Jasmine 2C
Posts: 125
Joined: Wed Sep 18, 2019 12:18 am

Re: polarizability

Postby Jasmine 2C » Sun Nov 10, 2019 12:29 pm

I don't really understand this too. Like how does it relate to melting and boiling point?

Joowon Seo 3A
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Joined: Sat Aug 24, 2019 12:17 am

Re: polarizability

Postby Joowon Seo 3A » Sun Nov 10, 2019 12:59 pm

The size of the molecule generally affects polarizability. When polarizability of molecules increase the energy of bonds between molecules increase resulting in higher melting and boiling points.

Christine Honda 2I
Posts: 81
Joined: Sat Sep 14, 2019 12:17 am

Re: polarizability

Postby Christine Honda 2I » Sun Nov 10, 2019 1:17 pm

When polarizability of molecules increases, it takes more energy to break the stronger bonds between molecules resulting higher melting and boiling points.

Vuong_2F
Posts: 50
Joined: Sat Sep 14, 2019 12:17 am

Re: polarizability

Postby Vuong_2F » Sun Nov 10, 2019 8:40 pm

Jasmine 3L wrote:I don't really understand this too. Like how does it relate to melting and boiling point?


Polarizability determines the strength of the bonds. The stronger the bonds, the more energy is required for a change in state (from solid to liquid or liquid to gas).


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