Dipole-dipole forces | Intermolecular forces and properties | AP Chemistry | Khan Academy

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Dipole-dipole forces occur between molecules with permanent dipoles (i.e., polar molecules). For molecules of similar size and mass, the strength of these forces increases with increasing polarity. Polar molecules can also induce dipoles in nonpolar molecules, resulting in dipole-induced dipole forces.
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[@megumi.2825]

Notes 🗒
**Dipole-Dipole Force**
Only occurs in polar molecules
Created by equal but opposite charges separated by short distances
Stronger D-D -> Higher Boiling Point -> Lower Vapor Point
- Molecules that have strong attraction need more energy to make them boil.
**Hydrogen bond** (polar molecule)
- Specially strong D-D force
When H is attached directly to F, O, N (large electronegative diff)
Example) HF, H20, NH3 (Very polar molecules)

[@mabby9051]

Thanksss

[@ksaii2358]

I havent done this in school but when I do I will have an idea of how to do it🙃

[@lrm9298]

You explain these concepts so well

[@armandofernandez6772]

Incredible explanation as always. Thx for sharing.

[@MyOwntuahur]

Thanks for this useful post..

[@afazmohammadtopsir8971]

Thanks for this useful post❤❤

[@socrates685]

Please complete India class 12 physics
1. Gauss Law
2.Solid State (Chemistry )

[@itselix_]

HEY IM ACTUALLY EARLY

[@Thundrain]

2:50 Dipole-dipole [F]

[@sciencenerd7639]

great explanation

[@monishagseervi4527]

Thanks

[@xiaog9201]

Would Acetaldehyde also have hydrogen bonding since the hydrogen from other Acetaldehydes are attracted to the oxygen ?

[@ThinkingRed09]

This is late but no, although there is an O in the molecule, the H is bonded to the C instead. The strength of hydrogen bonds come from its polarity (the difference between electronegativity). So true hydrogen bonds can only occur between H and F, O, N (otherwise the difference is too small).
TL;DR: For hydrogen bonding, H must bond to F, O, N. It is bonded to C.

[@KevinEPerez-ds6rv]

👌

[@Taty-mt7hd]

Yay

[@ijustwatchsomeyoutube2186]

No way lol.