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Lecture 4

CHEM 1F92 Lecture Notes - Lecture 4: Pure Phase, Phase Diagram, Atomic Radius


Department
Chemistry
Course Code
CHEM 1F92
Professor
Theocharis C Stamatatos
Lecture
4

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CHEM1F92
Jan.11th,2016
Reviewfromlastclass
Cubiccells(numberofatoms,relationshipsofedge,a,withtheatomicradius,r)
Phasediagramillustratestherelationshipamongthephasesofasinglesubstance
Eachregioninthephasediagramrepresentsapurephase.Theboundariesbetweenthe
regionsshowthetemperatureandpressuresatwhich2phasesareinequilibrium
*Basedonthisphasediagram,aspressuredecreased,theboilingpointis___?
Answer:decreased
*WhichprocesssorrespondstoCO2(s)sublimationatatmosphericconditions?
Answer:C
sublimationrefersfromsolidtogasphase
Carrowindiagramreferstotheprocessofsublimation
CO2insolidformisdryice
Energychangesareassociatedwith:
Changeofstate 
Changeoftemperature
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