Chemteacher

swim, chem, baseball, I talk with my hands

AP Chemistry – Class 10

Dates

  • Monday, January 26th

Review AP Problems

  • yup – any questions?
  • turn them in

New Idea – Phase Diagrams

  • Compare these two images
  • How are they related?
  • How do I use each of them?

p1 p2

Phase Diagram

  • isotherm vs isobar
  • P / T are external conditions
  • P & T needed to determine the phase
  • Phase change involves changing P or T or both
  • EXAMPLE – ice skating
  • EXAMPLE – cooking at high altitude
  • melting / freezing = fusion
  • boiling / condensation = vaporization
  • sublimation = sublimation

Cooling Curve

  • flat line = phase change
  • length of line = magnitude of DH
  • slope of line = magnitude of specific heat capacity
  • cooling (or heating curve) is what a horizontal slice looks like on P/T Phase diagram

Information

This entry was posted on 2015-01-26 by in Agenda, APChem and tagged , .

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