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polarizability

Posted: Sun Nov 10, 2019 11:19 am
by Adam Kramer 1A
What causes different polarizability of molecules, and why does that affect a molecule being solid or liquid at room temperature?

Re: polarizability

Posted: Sun Nov 10, 2019 11:22 am
by alexfwang3g
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.

Re: polarizability

Posted: Sun Nov 10, 2019 11:26 am
by Rebecca Epner 4A
Polarizability also explains the likelyhood of a certain atom to become distorted. This is why larger atoms have a higher polorizability

Re: polarizability

Posted: Sun Nov 10, 2019 12:01 pm
by Frederick Keith_4C
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.

Re: polarizability

Posted: Sun Nov 10, 2019 12:04 pm
by Areena H 2K
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.

Re: polarizability

Posted: Sun Nov 10, 2019 12:22 pm
by Louise Lin 2B
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.

Re: polarizability

Posted: Sun Nov 10, 2019 12:29 pm
by Jasmine 2C
I don't really understand this too. Like how does it relate to melting and boiling point?

Re: polarizability

Posted: Sun Nov 10, 2019 12:59 pm
by Joowon Seo 3A
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.

Re: polarizability

Posted: Sun Nov 10, 2019 1:17 pm
by Christine Honda 2I
When polarizability of molecules increases, it takes more energy to break the stronger bonds between molecules resulting higher melting and boiling points.

Re: polarizability

Posted: Sun Nov 10, 2019 8:40 pm
by Vuong_2F
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).