chem215_week07_intermolecular_forces_Summer_2011

chem215_week07_intermolecular_forces_Summer_2011 - Phase...

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Phase Changes; Liquids and Vapor Pressure 12.1: An overview of physical states and phase changes (review types of intermolecular forces and phase diagrams) 12.2: Quantitative aspects of phase changes
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Liquid-Gas Equilibrium and Vapor Pressure For constant surface area: Rate of evaporation =  k evap Rate of condensation =  k cond   [gas] As [gas] increases, rate of condensation increases Rate of evaporation remains constant (if temp is constant) At equilibrium, Rate  = Rate Fig. 12.4
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Vapor Pressure H 2 O (l)   H 2 O (g) K eq   =  p H 2 O (g) Endothermic reaction  K eq  increases as Temp increases 
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Vapor Pressure as a function of temperature. - Vapor Pressure of liquid = 760 torr @ normal boiling point
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The effect of temperature on the distribution of molecular speeds in a liquid. Fig. 12.5
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function of temperature and intermolecular forces. -
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chem215_week07_intermolecular_forces_Summer_2011 - Phase...

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