ch 12 liquids solids l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
III. Changes of State (p. 372 - 382) PowerPoint Presentation
Download Presentation
III. Changes of State (p. 372 - 382)

Loading in 2 Seconds...

play fullscreen
1 / 9

III. Changes of State (p. 372 - 382) - PowerPoint PPT Presentation


  • 267 Views
  • Uploaded on

Ch. 12 - Liquids & Solids. III. Changes of State (p. 372 - 382). A. Phase Changes. A. Phase Changes. Evaporation molecules at the surface gain enough energy to overcome IMF Volatility measure of evaporation rate depends on temp & IMF. # of Particles. temp. volatility. IMF. volatility.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'III. Changes of State (p. 372 - 382)' - oma


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
a phase changes
A. Phase Changes

C. Johannesson

a phase changes3
A. Phase Changes
  • Evaporation
    • molecules at the surface gain enough energy to overcome IMF
  • Volatility
    • measure of evaporation rate
    • depends on temp & IMF

C. Johannesson

a phase changes4

# of Particles

temp

volatility

IMF

volatility

Kinetic Energy

A. Phase Changes

Boltzmann Distribution

p. 477

C. Johannesson

a phase changes5
A. Phase Changes
  • Equilibrium
    • trapped molecules reach a balance between evaporation & condensation

C. Johannesson

a phase changes6

temp

v.p.

IMF

v.p.

A. Phase Changes

p.478

  • Vapor Pressure
    • pressure of vapor above a liquid at equilibrium

v.p.

  • depends on temp & IMF
  • directly related to volatility

temp

C. Johannesson

a phase changes7

Patm

b.p.

IMF

b.p.

A. Phase Changes
  • Boiling Point
    • temp at which v.p. of liquid equals external pressure
  • depends on Patm & IMF
  • Normal B.P. - b.p. at 1 atm

C. Johannesson

a phase changes8

IMF

m.p.

A. Phase Changes
  • Melting Point
    • equal to freezing point
  • Which has a higher m.p.?
    • polar or nonpolar?
    • covalent or ionic?

polar

ionic

C. Johannesson

a phase changes9
A. Phase Changes
  • Sublimation
    • solid  gas
    • v.p. of solid equals external pressure
  • EX: dry ice, mothballs, solid air fresheners

C. Johannesson