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london forces

Posted: Fri Nov 22, 2019 12:36 am
by connie 2C
if two molecules have only london dispersion forces, how do you know which is stronger?

Re: london forces

Posted: Fri Nov 22, 2019 1:08 am
by Samuel Tzeng 1B
The larger molecule will have stronger London forces

Re: london forces

Posted: Fri Nov 22, 2019 1:49 am
by Tiffany Chao 2H
The one with the bigger molar mass (and more electrons). It allows for more interactions which increases the London Dispersion Force.

Re: london forces

Posted: Fri Nov 22, 2019 1:50 am
by AprilPaz
London forces is dependent on the size of the molecule. Thus, just look for the larger molar mass.

Re: london forces

Posted: Fri Nov 22, 2019 7:28 pm
by CynthiaLy4F
The molecule with the greater number of electrons will have stronger London dispersion forces.

Re: london forces

Posted: Fri Nov 22, 2019 8:05 pm
by Emma Popescu 1L
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.

Re: london forces

Posted: Fri Nov 22, 2019 8:10 pm
by Claire Grover 3G
The molecule that is most polarizable (larger, more electrons) will have the largest London forces.

Re: london forces

Posted: Fri Nov 22, 2019 8:56 pm
by Rohan Kubba Dis 4B
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.

Re: london forces

Posted: Sat Nov 23, 2019 3:47 pm
by ValerieChavarin 4F
London forces depends on the size of a molecule. Since larger molecules are more polarizable they form stronger London forces.

Re: london forces

Posted: Sun Nov 24, 2019 10:43 pm
by Betania Hernandez 2E
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.