phase changes what did one water molecule say to another water molecule about vapor? don’t worry...
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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
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