Intermolecular Forces

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Claire Guo 1B
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Intermolecular Forces

Postby Claire Guo 1B » Sun Nov 11, 2018 4:55 pm

Which force is stronger, Van der Waals forces or Dispersion Forces?

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Re: Intermolecular Forces

Postby Schuyler_Howell_4D » Sun Nov 11, 2018 4:59 pm

I also have a follow-up question to this... In class, we talked about how those forces would be interchangeable with dipole-induced dipole interactions. Does this mean they are the same or for sake of simplicity we treat them the same way?

Sona Hakobyan 3J
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Re: Intermolecular Forces

Postby Sona Hakobyan 3J » Sun Nov 11, 2018 5:05 pm

I thought these are both names, in addition to some others, for the same forces--and therefore the same strength. I'm not 100 percent sure. Anyone know for sure?

Matthew Tran 1H
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Re: Intermolecular Forces

Postby Matthew Tran 1H » Sun Nov 11, 2018 5:25 pm

In lecture, Dr. Lavelle said that we could use the following terms interchangeably: London forces, dispersion forces, van der Waals forces, and induced dipole-induced dipole (NOT dipole-induced dipole; this interaction is between a molecule with permanent dipole that induces a dipole in the nonpolar molecule it is interacting with). I believe they are all the same in the context of this class; however, one confusing thing I noticed in the textbook was that they seemed to classify all IMFs as van der Waals interactions. I personally prefer to use the term London dispersion forces.
Last edited by Matthew Tran 1H on Sun Nov 11, 2018 5:32 pm, edited 1 time in total.

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Re: Intermolecular Forces

Postby anthony_trieu2L » Sun Nov 11, 2018 5:31 pm

Yes, Van der Waals forces and London dispersion forces are used interchangeably and are therefore the same strength. They are the weakest intermolecular forces between molecules.

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