L1 /
15
CH1012
STEAM DISTILLATION
I
Steam
Distillation DGsoln = +ve
Boil water with an immiscible organic liquid.
Agitate (stir) the mixture.
Each liquid behaves independently.
ptotal = poH2O + poorganic
ptotal = poH2O + poorganic
ptotal
poH2O
poorganic
1atm
V.P.
T
1) bp. of mixture is less
than bp. of either organic
liquid or water - useful prevents cracking
than bp. of either organic
liquid or water - useful prevents cracking
2) bp. is independent of proportions present
3) Vapour composition ptotal = poH2O + poorganic
