Melting points

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Hannah_1G
Posts: 100
Joined: Wed Sep 18, 2019 12:22 am

Melting points

Postby Hannah_1G » Wed Nov 20, 2019 9:30 pm

Would a double bond create a higher melting point than a dipole moment?

Abigail Sanders 1E
Posts: 112
Joined: Wed Sep 11, 2019 12:16 am

Re: Melting points

Postby Abigail Sanders 1E » Wed Nov 20, 2019 11:05 pm

Melting point generally depends on the type of intermolecular forces present in molecules. For example, dipole moments could contribute to a polar structure which would create dipole-dipole interactions. The strength of the double bond and its affect would depend on the size of the atoms involved and the types of intermolecular forces involved.

Tauhid Islam- 1H
Posts: 64
Joined: Fri Aug 02, 2019 12:15 am

Re: Melting points

Postby Tauhid Islam- 1H » Thu Nov 21, 2019 2:06 am

Melting point and boiling points are determined by how strongly one molecule of a substance is attracted to another molecule of the same substance or another substance, essentially these forces are called intermolecular forces. These stronger these forces, the more energy required to break them and change the substance's phase, resulting in a phase change. The easier way I think about it is you have have a beaker of a solution that just contained the molecule. You wouldn't break the bonds that form the molecule inorder to get a phase shift, you just need to make the molecules less bound to one another. Double bonds are bonds that are present within a molecule and essentially makes up the molecule, so breaking that bond wouldn't result in a phase shift but a breakdown of the molecule.

Daniel Toscano 1L
Posts: 95
Joined: Tue Nov 13, 2018 12:18 am

Re: Melting points

Postby Daniel Toscano 1L » Thu Nov 21, 2019 10:26 am

I think only intermolecular forces affect melting/boiling points.

annikaying
Posts: 94
Joined: Sat Sep 14, 2019 12:16 am

Re: Melting points

Postby annikaying » Thu Nov 21, 2019 10:35 am

Intermolecular forces are the only thing that determine melting and boiling points. Therefore having a double bond doesn't affect the melting point.

vanessas0123
Posts: 100
Joined: Wed Sep 11, 2019 12:17 am

Re: Melting points

Postby vanessas0123 » Sun Nov 24, 2019 3:23 pm

Intermolecular forces are the significant factors affect melting points! The stronger/ more intermolecular forces, the higher the melting/boiling points.

Nuoya Jiang
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: Melting points

Postby Nuoya Jiang » Sun Nov 24, 2019 3:30 pm

The bond strength of a double bond is talking about "INTRA" molecular force, while the melting point is related to "INTER" molecular force.

Tahlia Mullins
Posts: 105
Joined: Thu Jul 25, 2019 12:15 am

Re: Melting points

Postby Tahlia Mullins » Sun Nov 24, 2019 6:09 pm

When determining relative melting points, consider the strength of the IMFs involved.

Jesalynne 2F
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Melting points

Postby Jesalynne 2F » Sun Nov 24, 2019 8:52 pm

Intermolecular forces affect the melting points, so the stronger the intermolecular force the higher the melting point and vice versa.

Cynthia Rodas 4H
Posts: 51
Joined: Wed Sep 18, 2019 12:21 am

Re: Melting points

Postby Cynthia Rodas 4H » Mon Nov 25, 2019 6:56 am

Melting points are determined based on their intermolecular forces. The more intermolecular forces it has, the more energy it would take to break bonds, resulting in a higher boiling and melting point.

AronCainBayot2K
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: Melting points

Postby AronCainBayot2K » Mon Nov 25, 2019 7:40 am

Melting point has a direct relationship with intermolecular forces. If the strength of a intermolecular force is strong, then the melting point must be high and vice versa with a weaker IMF. For example, molecules that have dispersion would have a lower melting point than for example a hydrogen bonded molecule.

605208780
Posts: 50
Joined: Wed Sep 18, 2019 12:16 am

Re: Melting points

Postby 605208780 » Tue Dec 03, 2019 12:27 pm

A double bond does not affect the melting point. The intermolecular force is what affects the melting point.

105335337
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: Melting points

Postby 105335337 » Tue Dec 03, 2019 12:38 pm

A double bond has nothing to do with melting point because melting point has to do with intermolecular forces rather than molecular bonds.

Jessica Tran_3K
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: Melting points

Postby Jessica Tran_3K » Tue Dec 03, 2019 1:06 pm

IMFs take precedence over bond length when considering melting/boiling points of molecules!

BritneyP- 2c
Posts: 101
Joined: Sat Sep 14, 2019 12:15 am

Re: Melting points

Postby BritneyP- 2c » Tue Dec 03, 2019 1:55 pm

intermolecular forces affect the melting point not the amount of bonds it has.

Kaitlynn Tran 3F
Posts: 54
Joined: Wed Sep 18, 2019 12:20 am

Re: Melting points

Postby Kaitlynn Tran 3F » Thu Dec 05, 2019 11:13 pm

Double bonds affect bond strength, but it doesn't affect melting point.


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