Intermolecular forces

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halle young 4A
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Joined: Thu Jul 11, 2019 12:16 am

Intermolecular forces

Postby halle young 4A » Wed Nov 13, 2019 11:15 am

can someone give a definition for london forces? the definition in my notes is a bit confusing. Also, is van der waals just a term to describe all intermolecular forces?

anjali41
Posts: 109
Joined: Fri Aug 09, 2019 12:15 am

Re: Intermolecular forces

Postby anjali41 » Wed Nov 13, 2019 11:21 am

According to the textbook, a London interaction is the interaction between instantaneous electric dipoles on neighboring molecules. Van der Waals interactions are Intermolecular interactions that depend on the inverse sixth power of the separation.

Cynthia Gong 1L
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Joined: Fri Aug 09, 2019 12:15 am

Re: Intermolecular forces

Postby Cynthia Gong 1L » Wed Nov 13, 2019 11:34 am

van der waals and london forces are terms that are typically used interchangeably.

Megan Vu 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:15 am

Re: Intermolecular forces

Postby Megan Vu 1J » Wed Nov 13, 2019 12:17 pm

Van der Waals and London forces are used as the same term. For the definition of London forces, it is essentially the weakest type of intermolecular forces, and this is usually between two dipoles. They are also known as induced dipole- induced dipole interactions as well.

Nare Nazaryan 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Intermolecular forces

Postby Nare Nazaryan 1F » Wed Nov 13, 2019 10:50 pm

Van der Waals and London interactions are used interchangeably, and refer to induced-dipole induced-dipole interactions. They are the weakest intermolecular force.

Brynne Burrows 3K
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Joined: Thu Jul 25, 2019 12:16 am

Re: Intermolecular forces

Postby Brynne Burrows 3K » Wed Nov 13, 2019 11:56 pm

Most molecules have London forces, which occur between two dipoles, and are the weakest intermolecular forces relative to the others.

Celine 1F
Posts: 120
Joined: Fri Aug 02, 2019 12:16 am

Re: Intermolecular forces

Postby Celine 1F » Thu Nov 14, 2019 10:13 am

Both London forces and Van Der Waals interactions are the same thing and can replace each other in a a sentence. These are the weakest intermolecular forces compared to the others.

Katie Bart 1I
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Joined: Sat Aug 24, 2019 12:16 am

Re: Intermolecular forces

Postby Katie Bart 1I » Thu Nov 14, 2019 10:36 am

You might also here London forces referred to as induced-dipole-induced-dipole interactions.

Quynh Vo
Posts: 45
Joined: Sun Sep 29, 2019 12:15 am

Re: Intermolecular forces

Postby Quynh Vo » Thu Nov 14, 2019 6:56 pm

Van der Waals bonds are the weakest of the IMF as it depends on the position of the electron. It's weak because the electron are constantly moving, creating temporary dipoles.

Debora Fernandez Clemente_ 4H
Posts: 52
Joined: Wed Sep 18, 2019 12:21 am

Re: Intermolecular forces

Postby Debora Fernandez Clemente_ 4H » Fri Nov 15, 2019 10:25 pm

can anyone explain why professor Lavelle preferred to London dispersion force to be called Induced Dipole- Induced Dipole?

Destiny_Ryales_3J
Posts: 38
Joined: Fri Sep 28, 2018 12:28 am

Re: Intermolecular forces

Postby Destiny_Ryales_3J » Fri Nov 15, 2019 10:27 pm

On the exams do we need to use those terms (induced dipole) or should we just say London Forces?


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