Chemistry > Vapor Pressure, Boiling Point, Phase Diagrams
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Vapor Pressure, Boiling Point, Phase Diagrams

  • Vapor pressure of liquid: example of equilibrium, equal and opposite rates of evaporation and condensation

  • B.p. temp. at which v.p. = external P.

  • Normal b.p. temp. at which v.p. = exactly 1 atm. or 760 torr.

  • Reduce pressure, reduce b.p. Vacuum distillation

  • Intermolecular forces and surface tension; viscosity

  • Enthalpy of vaporization > enthalpy of melting due to total breaking of intermolecular forces

  • Learn how to draw a general phase diagram

  • Significance of: triple point; critical point; difference between dense gas and liquid is absence of surface

  • Supercritical carbon dioxide – useful solvent