Lecture_29 - Todays Lecture Liquids and Solids 16.10 Vapor...

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1 1 Liquids and Solids Today’s Lecture 16.10 Vapor Pressure and Changes of State 16.11 Phase Diagrams 1 Vaporization of Liquids ± now that we’ve considered all 3 physical states of matter we can explore the processes by which matter changes state ± e.g. vaporization (or evaporation) ± passage of molecules from the surface of a liquid into the gaseous state ± endothermic process since energy is required to overcome the intermolecular forces that exist between molecules in the liquid state 2 ± the energy required to vaporize 1 mole of a liquid at a pressure of 1 atm is called the standard heat of vaporization (or standard enthalpy of vaporization), which is symbolized as Δ H o vap
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2 2 Vapor Pressure and Volatile Liquids ± in a closed container a liquid will initially evaporate at a greater rate than it condenses back into liquid form but eventually the rates equalize and the system reaches equilibrium ± the pressure of the vapor present at equilibrium is
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Lecture_29 - Todays Lecture Liquids and Solids 16.10 Vapor...

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