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2.06 Phase Change (energy change (attractive bonds (solids formed from…
2.06 Phase Change
energy change
attractive bonds
solids
formed from many attractive bonds
breaking attractive bonds
takes (absorbs) energy
endothermic
melt (liquify)
stored as
latent energy
forming attractive bonds
releases energy
exothermic
freeze (solidify)
from
Latent energy
#
liquids
formed from relatively few attractive bonds
breaking
attractive bonds
takes (absorbs) energy
endothermic
vaporization
Stored as
Latent Energy
forming
attractive bonds
releases energy
exothermic
condensation
from
Latent Energy
#
latent means hidden
latent fingerprints
invisible
latent energy
not thermal energy
not molecular energy
not part of temperature
solid / liquid
melting
solid to liquid
endothermic
no temp change
latent energy
freezing
liquid to solid
exothermic
no temp change
Latent Energy
#
liquid / gas(vapor)
vaporization
liquid change to gas
evaporation
temp below boiling point
endothermic
temp cooled to dew point
latent energy
boiling
at the boiling point
endothermic
no temp change
latent energy
#
condensation
gas change to liquid
exothermic
energy released
atmospheric moisture
temp raised to dew point
Latent energy
#
live steam
at 100 °C
Latent energy
solid / gas
sublimation
absorbs energy
endothermic
Latent energy
#
deposition
releases energy
exothermic
Latent energy