Determining intermolecular forces

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Determining intermolecular forces

Postby 205192823 » Tue Nov 19, 2019 4:08 pm

How do you determine which intermolecular force is involved in a molecule?

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Re: Determining intermolecular forces

Postby Mashkinadze_1D » Tue Nov 19, 2019 5:23 pm

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.

Kassidy Ford 1I
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Re: Determining intermolecular forces

Postby Kassidy Ford 1I » Fri Nov 22, 2019 9:02 am

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.

Deepika Reddy 1A
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Re: Determining intermolecular forces

Postby Deepika Reddy 1A » Fri Nov 22, 2019 9:07 am

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.

Anika Chakrabarti 1A
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Re: Determining intermolecular forces

Postby Anika Chakrabarti 1A » Fri Nov 22, 2019 9:14 am

There are also dipole-induced dipole forces, which occur between a polar and a nonpolar molecule.

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