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Determining intermolecular forces

Posted: Tue Nov 19, 2019 4:08 pm
by 205192823
How do you determine which intermolecular force is involved in a molecule?

Re: Determining intermolecular forces

Posted: Tue Nov 19, 2019 5:23 pm
by Mashkinadze_1D
This would be based primarily off memorization and then identification. The way we can see this is induced-dipole-induced-dipole in every aspect of every molecule due to the slight polarization in electron cloud. The next one we can look at is dipole-dipole which occurs any time that there is a significant enough difference in the electronegativity of the two atoms being bonded and therefore a slight change in charge. The following would be H-bonding which is simply a form of dipole-dipole bonding that occurs when hydrogen is bonded to either F, O, or N. Lastly, there is ionic forces which occur with a cation and anion due to the difference in charge.

Re: Determining intermolecular forces

Posted: Fri Nov 22, 2019 9:02 am
by Kassidy Ford 1I
if it is nonpolar then it will only be affected by dispersion forces. If it is non-polar it will be affected by dipole-dipole forces. if there are H bonded to N,O,F then it will experience H bonding.

Re: Determining intermolecular forces

Posted: Fri Nov 22, 2019 9:07 am
by Deepika Reddy 1A
Everything has dispersion forces. Nonpolar molecules can only have london dispersion intermolecular forces. Polar molecules also have dipole-dipole in addition to london dispersion forces. You can tell the type of intermolecular force based on the charges on the substance, either full charge, partial charge, or no charge.

Re: Determining intermolecular forces

Posted: Fri Nov 22, 2019 9:14 am
by Anika Chakrabarti 1A
There are also dipole-induced dipole forces, which occur between a polar and a nonpolar molecule.