Types of Phase Changes
condensation/vaporization
freezing/melting (or fusion)
Enthalpy changes accompany phase changes!
condensation and freezing: exothermic processes
vaporization and melting: endothermic processes
DHofus = heat of fusion (+)
DHovap = heat of vaporization (+)
DHosubl = heat of sublimation = DHofus + DHovap (Hess’s Law)
solid gas
gas solid (called deposition)
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