CHMA11H3 Lecture : Intermolecular Forces

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CHMA11H3 Full Course Notes
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Determine the type of forces between atoms in a molecule, you need to know the electronegativity of the atoms and the shape of the molecule. Surface tension is a property of liquids that results from the tendency of liquids to minimize their surface area. Molecules in the condensed phase like to be surrounded by other molecules to optimize the intermolecular force between molecules. Surface tension: energy required to increase the surface of a liquid while having the same volume. Surface tensions are causes liquid to spread out and gives the shape of meniscuses. Stronger the intermolecular attractive forces, the higher the surface tension. Greater the temperature more energy to overcome intermolecular forces surface tension goes down (because all molecules are getting more energy) Surface tension of mixing two liquids depends of the mixing. In a viscous liquid, molecules are all hanging onto each other, restricting flow.

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