CH1012
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                                         L1 /   
7
SOME USES
When is it valid to use these diagrams?
- in a closed system
1 atm.
H2O
- when the system is at equilibrium
Sublimation  if pext < ptp 
then sublimation occurs
Freeze Drying
1) freeze sample:      water        ® ice crystals
2) pump on sample: solid (ice) ® gas (»1mtorr)
frezedryer TFD5505_Freeze_Dryer