In this lecture you will learn about Vapor Pressure, Boiling Points, and Phase Diagrams. You will first cover Pressure as it relates to an Equilibrium Phenomenon through a though experiment involving water. Next, you will learn about the Boiling Point and Normal Boiling Point, as well as how to Reduce the Boiling Point. Next are Surface Tension and Viscosity which will be explained using Intermolecular Forces. Lastly, are the segments involving Phase Diagrams which will cover important topics such as Vapor Pressure Curve, Melting Point Line, Triple Point, Critical Point, and Sublimation.
pressure of liquid: example of equilibrium, equal and opposite rates
of evaporation and condensation
temp. at which v.p. = external P.
b.p. temp. at which v.p. = exactly 1 atm. or 760 torr.
pressure, reduce b.p. Vacuum distillation
forces and surface tension; viscosity
of vaporization > enthalpy of melting due to total breaking of
how to draw a general phase diagram
of: triple point; critical point; difference between dense gas and
liquid is absence of surface
carbon dioxide useful solvent
Vapor Pressure, Boiling Point, Phase Diagrams
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
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