Question #a6f93

1 Answer
Aug 28, 2015

Answer:

Dispersion forces increase with contact area because there are more fluctuations in electron density around the surface.

Explanation:

You have learned that London dispersion forces are caused by a temporary fluctuation of electron density in one molecule that induces a temporary dipole in a nearby molecule.

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Large molecules have big surface areas and more electrons.

There are more fluctuations in electron density in different parts of the molecule.

Surface area
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The small dispersion forces around the molecule add up to cause stronger attractive forces with its neighbours.