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Hydrogen Bonds

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by

Michael Soloman

on 16 September 2013

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Transcript of Hydrogen Bonds

Hydrogen Bonds
What is a Hydrogen bond?
A hydrogen bond is weak bond between a hydrogen atom and a highly electronegative atom.
How does it work?
A hydrogen atom already bonded with a highly electronegative atom (F, N, O) creates a positive charged side and a negative charged side, also known as a dipole. The hydrogens positive force attracts the highly electronegative side of an entirely different molecule and they bond.
What does it do?
Hydrogen bonds increase the boiling of the substance when formed. The bonds make the substance more structurally stable and it takes more energy to break all the bonds and get it to boil.
Example
In plants, water is pulled up through the stem and distributed through out the plant. Hydrogen bonds between water molecules allows more water to be pulled up and distributed at a reasonable rate.
Example 2
Hydrogen bonds are the bonds that hold DNA together. They are between adenine and thymine, cytosine and guanine. Without it, the DNA would fall apart
Molecules with hydrogen bonds

Water
Methoxymethane
Methylamine
Ethonal
Ammonia
Hydrogen peroxide
Glucose
http://en.wikipedia.org/wiki/Hydrogen_bond
http://chemwiki.ucdavis.edu/Physical_Chemistry/Physical_Properties_of_Matter/Atomic_and_Molecular_Properties/Intermolecular_Forces/Hydrogen_Bonding
http://www.brighthub.com/science/genetics/articles/23384.aspx
April P., Franz S., Bryson B., Michael S.
Full transcript