Intermolecular Forces and Some Properties of Liquids

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Intermolecular Forces and Some Properties of
Liquids

• Cohesive Forces
• Intermolecular forces between like molecules.
• Adhesive Forces
• Intermolecular forces between unlike molecules.
• Surface Tension
• Energy or work required to increase the surface
  area of a liquid.
• Viscosity
• A liquids resistance to flow

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Intermolecular Forces
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Intermolecular Forces
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Vaporization of LiquidsVapor Pressure
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Enthalpy of Vaporization
?Hvap Hvapor Hliquid - ?Hcondensation
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Clausius-Clapeyron Equation
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13-3 Some Properties of Solids
Freezing Point
?Hfus(H2O) 6.01 kJ/mol
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Sublimation
?Hsub ?Hfus ?Hvap -?Hdeposition
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13-4 Phase Diagrams
Iodine
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Phase Diagrams
Carbon dioxide
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Supercritical Fluids
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Critical Temperatures and Pressures
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Water
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13-5 Van der Waals Forces

• Instantaneous dipoles.
• Electrons move in an orbital to cause a
  polarization.
• Induced dipoles.
• Electrons move in response to an outside force.
• Dispersion or London forces.
• Instaneous dipole induced dipole attraction.
• Related to polarizability.

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Instantaneous and Induced Dipoles
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Dipole Dipole Interactions
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Hydrogen Bonding