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instantaneous dipoles

Posted: Sat Nov 09, 2019 12:14 pm
by Rodrigo2J
what is more important in determining the relative boiling/melting point of a molecule: surface area (shape) of the molecule or the number of electrons?

Re: instantaneous dipoles

Posted: Sat Nov 09, 2019 12:49 pm
by Reagan Smith 1H
I don't know which one is "more important" per se, but Dr. Lavelle pointed out that while shape impacts the difference in boiling/melting points, the number of electrons impacts it more drastically.

Re: instantaneous dipoles

Posted: Sat Nov 09, 2019 1:02 pm
by Daria Azizad 1K
Number of electrons and shape of the molecule are often interrelated, as a molecule with more electrons will be larger. When comparing electrons with similar numbers of electrons, then shape will likely be a determining factor.

Re: instantaneous dipoles

Posted: Sat Nov 09, 2019 1:11 pm
by Amina Durrani 3G
I think surface area since increased surface area means increased noncovalent interactions between molecules which means that it will take more energy/heat to break them apart thus increasing boiling point.