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Honors Chemistry. Mr. Fredericks 2009-2010. Tuesday, January 26 th. Do Now: Destroy Tokyo. Your tools are a paper clip, a rubber band, a pair of tube socks, and a ballpoint pen (no ink). Objectives: Learn about partial pressures, diffusion, and effusion. Homework: Quiz on Friday.

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honors chemistry

Honors Chemistry

Mr. Fredericks

2009-2010

tuesday january 26 th
Tuesday, January 26th
  • Do Now:
    • Destroy Tokyo. Your tools are a paper clip, a rubber band, a pair of tube socks, and a ballpoint pen (no ink).
  • Objectives:
    • Learn about partial pressures, diffusion, and effusion.
  • Homework:
    • Quiz on Friday.
    • Read 14.4. Do problems #31, 34, 35
partial pressure
Partial Pressure
  • Add ‘em up!Ptotal = P1 + P2 + P3 and so on
  • Typically used in kPa, but sometimes as percentages.
  • If you’re having trouble, you’re overthinking it.
random motion of gasses
Random Motion of Gasses

Diffusion

Effusion

Rate of escape

Assume a tiny hole

Low molar mass means high effusion

  • Rate of spread
  • Assume no physical barriers
  • Low molar mass means high diffusion