Ch. 9 - IMF's, Liquids, Solids

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8 Terms

1
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when there are more e- (heavier)…..

LDF are stronger

2
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Polarizability

the ability of an e- cloud to distort. Outer e- are held less tightly in larger atoms, so are more polarizable

3
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D-D must be….

polar overall, not just polar bonds

4
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Enthalpy of Vaporization

ΔHvap: the enthalpy Δ associated w/ vaporizing 1 mole of substance

  • ALWAYS ENDOTHERMIC

5
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Condensation ΔH

ΔHcond = - ΔHvap

6
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What causes vapor pressure?

Place a liquid in closed container: At beginning, there is net vaporization as surface molecules escape. Eventually a constant vapor pressure

7
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Temperature dependence of Pvap

conclusion: vap increases as T increases

<p>conclusion: vap increases as T increases</p>
8
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Equation (Temperature dependence of Pvap)

  • T in Kelvin

  • R = 8.314 J/mol*K

  • when solving, at the very end you eX on both sides of eqn to get rid of ln

<ul><li><p>T in Kelvin</p></li><li><p>R = 8.314 J/mol*K</p></li><li><p>when solving, at the very end you e<sup>X</sup> on both sides of eqn to get rid of ln</p><p></p></li></ul><p></p>