Phase Changes What did one water molecule say to another water molecule about vapor? Don’t worry...
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Transcript of Phase Changes What did one water molecule say to another water molecule about vapor? Don’t worry...
Phase Changes
What did one water molecule say to another water molecule about vapor?Don’t worry it’s just a phase he’ll cool
down.
Characteristics of Phase Changes
• _________________are also referred to as phases.• Phase Change:
____________________________________________________________________________________________________________________________________
PHASE CHANGES
Description of Phase Change
Term for Phase Change
Heat Movement DuringPhase Change
__________________
Melting
Heat _________________the solid as it melts.
__________________
FreezingHeat _________ the liquid as it freezes.
Description of Phase Change
Term for Phase Change
Heat Movement During Phase Change
__________________________
Vaporization, which includes boiling and evaporation
Heat _____________ the liquid as it vaporizes.
__________________________
CondensationHeat ___________ the gas as it condenses.
PHASE CHANGES
Phase Change graphic
____________
___________
____________________________
Average Kinetic Energy = Temperature
Temperature ______________________ ____________________________________________________. Meaning that temperature measures movement of particles.
Temperature is ______________________ _____________________ kinetic energy of the molecules of a substance. That means if you double the Kelvin temperature of a substance, you double the average kinetic energy of its molecules.
When the average kinetic energy of the molecules goes up (a rise in temperature), ____________________________________________________________________. A change in average kinetic energy is not directly proportional to a change in average speed.
Using Temperature to Indicate Phase Change
________________________________________________________________________________
___________________________________________________________.
Heat (thermal energy)
Tem
pera
ture
º C
.
100
0
A
B
C
D
E
solid
liquid
gas
Water Phase Change Graph
Heat (thermal energy)
Tem
pera
ture
º C
.
100
0
A
B
C
D
E
solid
liquid
gas
Water Phase Change Graph
Heat (thermal energy)
Tem
pera
ture
º C
.
100
0
A
B
C
DE
__________
________
_________
_______
Water Phase Change Graph
B C
A
F
ED
Between E and F-Heat change in _________________-Particles ______________________-Temp. ________________________-Gas
Between D and E-Heat change in _________________-Particles get ___________________-Temp. ________________________-Boiling
Between B and C-Heat change in Potential Energy-Particles ___________________-Temp. _____________________-MELTING
Between C and D-Heat change in ______________-Particles ___________________-Temp. ___________________-liquid
Between A and B-Heat change in _____________-Particles move ______________-Temp._____________________-Solid