london forces

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connie 2C
Posts: 106
Joined: Thu Jul 11, 2019 12:17 am

london forces

Postby connie 2C » Fri Nov 22, 2019 12:36 am

if two molecules have only london dispersion forces, how do you know which is stronger?

Samuel Tzeng 1B
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: london forces

Postby Samuel Tzeng 1B » Fri Nov 22, 2019 1:08 am

The larger molecule will have stronger London forces

Tiffany Chao 2H
Posts: 117
Joined: Fri Aug 09, 2019 12:17 am

Re: london forces

Postby Tiffany Chao 2H » Fri Nov 22, 2019 1:49 am

The one with the bigger molar mass (and more electrons). It allows for more interactions which increases the London Dispersion Force.

AprilPaz
Posts: 51
Joined: Wed Sep 18, 2019 12:18 am

Re: london forces

Postby AprilPaz » Fri Nov 22, 2019 1:50 am

London forces is dependent on the size of the molecule. Thus, just look for the larger molar mass.

CynthiaLy4F
Posts: 103
Joined: Sat Jul 20, 2019 12:16 am

Re: london forces

Postby CynthiaLy4F » Fri Nov 22, 2019 7:28 pm

The molecule with the greater number of electrons will have stronger London dispersion forces.

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

Re: london forces

Postby Emma Popescu 1L » Fri Nov 22, 2019 8:05 pm

The molecule with the highest molar mass (and so size and number of electrons) has the highest polarisability so the electrons in the electron cloud can easily be distorted so it has the strongest london dispersion interactions.

Claire Grover 3G
Posts: 64
Joined: Wed Sep 18, 2019 12:18 am

Re: london forces

Postby Claire Grover 3G » Fri Nov 22, 2019 8:10 pm

The molecule that is most polarizable (larger, more electrons) will have the largest London forces.

Rohan Kubba Dis 4B
Posts: 50
Joined: Sat Aug 17, 2019 12:18 am

Re: london forces

Postby Rohan Kubba Dis 4B » Fri Nov 22, 2019 8:56 pm

Essentially, if both have LDF as their chiefs intermolecular force, the one that is larger or more polarizable will have a stronger LDF. Another way to push this is to say that the one with a larger molar mass will have stronger London Dispersion Forces. This means that as you go down in group, it will almost always have an increase in LDF.

ValerieChavarin 4F
Posts: 99
Joined: Wed Sep 18, 2019 12:18 am

Re: london forces

Postby ValerieChavarin 4F » Sat Nov 23, 2019 3:47 pm

London forces depends on the size of a molecule. Since larger molecules are more polarizable they form stronger London forces.

Betania Hernandez 2E
Posts: 107
Joined: Fri Aug 02, 2019 12:15 am

Re: london forces

Postby Betania Hernandez 2E » Sun Nov 24, 2019 10:43 pm

London dispersion forces increase in strength with increasing polarizability of the molecule. The polarizability of a molecule increases with the number of electrons, therefore the larger molecule will have stronger London Dispersion force.


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