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CHANGES OF STATE. By: Edith Velasquez Chapter 3 Section 2 . CHART. SUBLIMATION SOLID LIQUID GAS Melting Point Boiling Point Freezing Vaporisation Condensation. SOLID TO LIQUID. SOLID TO LIQUID.

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changes of state

CHANGES OF STATE

By: Edith Velasquez

Chapter 3

Section 2

chart
CHART

SUBLIMATION

SOLID LIQUIDGAS

MeltingPointBoilingPointFreezingVaporisation

Condensation

solid to liquid1
SOLID TO LIQUID
  • MELTING: thechange in statefrom a solidto a liquid.
  • MELTING POINT: thetempeture at wich a substancechangesfrom a solidto a liquid.
  • At itsmeltingpoint, theparticlesof a solidsubstance are vibrating so fastthattheybreack free fromtheirfixedpositions.
liquid to solid1
LIQUID TO SOLID
  • FREEZING: thechange os statefromliquidtosolid.
  • At itsfreezingtempeture, theparticlesof a liquid are moving so slowlythattheybegintoform regular patterns.
  • Example: liquidwaterinto a freezer, thewaterloosesenergytothe cold air in thefreezer.Just a fewhours in freezer andtheliquidbecomessolid.
liquid to gas1
LIQUID TO GAS
  • Liquids can vaporize in twoways.
  • VAPORIZATION: thechangefromliquidto gas.
  • Vaporizationtakes place whentheparticles in

a liquidgainenoughenergytoform a gas.

  • Vaporizationthattakes place onlyonthesufaceof a liquidiscalled EVAPORIZATION.
  • BOILING: occurswhenliquidchangesto gas belowitssurface as well as at thesurface.
  • BOILING POINT: tempeure at whichliquidboils.
solid to gas1
SOLID TO GAS
  • SUBLIMATION: occurswhenthesurfaceparticlesof a solidgainenoughenergythattheyform a gas.
  • Duringsublimationparticlesof a solid do not pass throughtheliquidstate as theyform a gas.
  • Example: Solidcarbon-dioxidecalled “dry-ice” sublimates,itchangesdirectlyinto a gas.
  • Insteadofmeltingthesolidcarbondioxideitbecomesdirectly gas.
condensation1
CONDENSATION
  • CONDENSATION: itistheoppositeofvaporization.
  • Condensationoccurswhenparticles in a gas lose enoughthermalenergytoform a liquid.
  • You can notseewater vapor. Water vapor is a colorless gas thatisimpossibletosee.
  • Example: Cloudstypicalyformwhenwater vapor in theatmospherecondensessintoliquiddroplets. Whenthedopletsgetheavyenoughtheyfalltothegownandthatswhatweknwo as rain.