Melting Points

(Polar molecules, Non-polar molecules, etc.)

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Ramneet Sandhu 3D
Posts: 50
Joined: Fri Aug 30, 2019 12:16 am

Melting Points

Postby Ramneet Sandhu 3D » Sat Nov 16, 2019 5:21 pm

Do we have to know the melting points of all the different interactions?

Gerald Bernal1I
Posts: 102
Joined: Thu Jul 11, 2019 12:16 am

Re: Melting Points

Postby Gerald Bernal1I » Sat Nov 16, 2019 5:25 pm

I don't think you have to memorize the melting points, but just know the strength of each molecular interaction and compare them.

Emma Popescu 1L
Posts: 105
Joined: Wed Sep 11, 2019 12:16 am

Re: Melting Points

Postby Emma Popescu 1L » Sat Nov 16, 2019 5:50 pm

You should be able to assume the which molecule would have a higher or lower melting point based on their shape and strength of interactions/bonds.

Madeline Phan 1E
Posts: 103
Joined: Sat Aug 17, 2019 12:18 am

Re: Melting Points

Postby Madeline Phan 1E » Sat Nov 16, 2019 7:01 pm

You simply need to relate bond strength to melting point. For example, a molecule involved in hydrogen bonding would have a higher melting point than one with merely dispersion forces because hydrogen bonds are stronger than London dispersion forces.

TarynD_1I
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Melting Points

Postby TarynD_1I » Sat Nov 16, 2019 7:25 pm

You should probably know which types of bonds are stronger than others, because the stronger the bond, the higher the melting/boiling point. For example, ion-ion being the strongest bond and induced dipole-induced dipole being the weakest.

Kylie Lim 4G
Posts: 110
Joined: Sat Aug 17, 2019 12:15 am

Re: Melting Points

Postby Kylie Lim 4G » Sat Nov 16, 2019 8:24 pm

It might be helpful to know the order of strength for intermolecular forces so that you can determine which molecules will have higher or lower melting points based on their bonds. I don't think we are expected to have memorized melting points of specific molecules.

Sofia Q
Posts: 49
Joined: Sat Aug 17, 2019 12:15 am

Re: Melting Points

Postby Sofia Q » Sat Nov 16, 2019 9:00 pm

You would just be asked to predict the melting point, nothing exact but more on the lines of high and low, or perhaps comparing two molecules and predicting which one would have a higher or lower melting point due to the bonds they have.

AveryAgosto
Posts: 76
Joined: Wed Sep 18, 2019 12:16 am

Re: Melting Points

Postby AveryAgosto » Sat Nov 16, 2019 9:15 pm

Memorizing the specific melting points isn't necessary but you can assume the boiling point from the interaction.


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