Intermolecular Forces and Liquid Properties

Intermolecular Forces and Liquid Properties - lower VP and...

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How does vapor pressure (VP), boiling point (BP), Polarity, and Molecular/Molar mass relate to intermolecular forces (IMF)??? m At a given temperature: A Strong IMF --> low VP, high BP Weak IMF --> high VP, low BP W Increased polarity --> stronger IMF Decreased polarity --> weaker IMF D Increased mass --> lower VP, higher BP Decreased mass --> higher VP, lower BP D To consider relative BP or VP of compounds, need to consider: 1) are the compounds polar or nonpolar? 2) if polar compounds, are the IMF dipole-dipole or H-bonding (stronger than dipole-dipole) 3) what are the molecular/molar masses of the compounds (heavier compounds have
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Unformatted text preview: lower VP and higher BP) 4) if you're considering both polar and nonpolar compounds, are the masses similar? If greatly different, need to consider that a very heavy nonpolar will have a lower VP and higher BP than a light polar (in many cases) V IMF (and the strengths thereof) also play roles in a liquid's: a) surface tension (stronger IMF --> greater surface tension) b) viscosity (stronger IMF --> higher viscosity) c) capillarity (competition between cohesive forces within liquid via IMF and adhesive forces between liquid and capillary tube walls)...
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This note was uploaded on 07/15/2011 for the course CHEM 2045 taught by Professor Gower during the Spring '11 term at University of Florida.

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