Bond Strength?

[jdla]

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Which is stronger a hydrogen bond or double bond?

 

[BloodySurgeon]

C=C is stronger than C-H intramolecularly however O-H ----- F-H is much stronger intermolecularly.

 

[PreMed4Dummies]

A double bond is actually composed of a sigma and pi covalent bond- these are intramolecular bonds. A hydrogen bond is a strong type of intermolecular bond. However, a covalent bond is much stronger than a hydrogen bond, hence the double bond has greater bond strength.

 

[BloodySurgeon]

[delete]

 

[jdla]

I confused now. Two different answers.

 

[PreMed4Dummies]

If I'm not mistaken, looking at the bond dissociation table on this site for example http://www.science.uwaterloo.ca/~cchieh/cact/c120/bondel.html.
It takes 614 kj/mol of energy to break a C=C while it takes 568 kj/mol to break H-F, 366 kj/mol to break O-H, and 391 kj/mol to break H-N. So since it takes greater energy to break C=C, its stronger. Does my reasoning make sense?

 

[BloodySurgeon]

I confused now. Two different answers.

same answer... hydrogen bond is an intermolecular bond and C=C is a intramolecular bond so you cant compare unless you mean C-H << C=C but then there is O-H > C-H

 

[jdla]

You guys are saying that double bonds are stronger than hydrogen bonds.

 

[jdla]

Thanks. I understand.