Before tackling this topic make sure you are able to:
- explain the difference between intermolecular and intramolecular forces.
- use electronegativity values to work out dipoles within molecules
- use ideas about molecular shapes and dipoles to predict whether or not a molecule is polar.
Hydrogen bonds in DNA
Professor Dave explains
What do these two graphs show?
How do we explain the trends?
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Hydrogen bonding is responsible for the extraordinary and unique properties of water.
Ice is less dense than liquid water and therefore floats.
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