MOLECULAR DISCUSION
JOCUSSING ON DISCUSION CAUSED BY THE PRESENCE OS A CONCENTRATION GRADIENT
LAOSW
DISCUSION -
CA =
CONCENTRATION GRADIENT
->
CONSTANT P ↓
↳Da dCA DAB= DISCUSION COESICIENT
->
CONSTANT T
-- CA =
CONCENTRATION OS A
dZ
C
z DISTANCE TRAVELLED
=
IXA= CONCENTRATION GRADIENT
MORE STRICTLY :
↓
-Day
CT= TOTAL CONCENTRATION
XA= MOLE GRACTION OS A
⑰DEFINITIONS
= =
GAS PHASE
AVERAGE VELOCITIES
MOLAR
MASS AVERAGE VELOCITY : MOLAR AVERAGE MASS
⑮
Vi
W
Umol =-
[CiVi
C
JLUXES
-
->
NA= GLUX DESINED WITH RESERENCE TO CIXED COORDINATES
->
JA =
GLUX DESINED WITH RECERENCE TO COORDINATES MOVING WITH AVERAGE VELOCITY
ISOTHERMAL ,
ISOBARIC SYSTEM :
I
EABYCA
DAB
-
SAMe
= -
~
16 C IS CONSTANT :
DA
I
NON-ISOTH-IRMAL ,
ISOBARIC SYSTEM :
EECDAB
, MASS TRANSPORT EQUATION
CONCENTRATION
BULK CLOW GRADIENT
COMPONENT COMPONENT
+NB) Ni-e
- -
De Xa
-
BINARY SYSTEM MULTI-COMPONENT SYSTEM
-> NOBUL SLOW : NATNB =0 :
W
NA=-D 0Z
-> DILUTE MIXTURE (i . e . MOST VAPOURS IN AIR) :
XAC1 AND CA +
STATIONARYI
->
STAGNANT B
:
NB
=
0 ..
A-D
NA(1 XA) -
=
-
x
↳NA=
-> USE COR INTEGRATION
JOCUSSING ON DISCUSION CAUSED BY THE PRESENCE OS A CONCENTRATION GRADIENT
LAOSW
DISCUSION -
CA =
CONCENTRATION GRADIENT
->
CONSTANT P ↓
↳Da dCA DAB= DISCUSION COESICIENT
->
CONSTANT T
-- CA =
CONCENTRATION OS A
dZ
C
z DISTANCE TRAVELLED
=
IXA= CONCENTRATION GRADIENT
MORE STRICTLY :
↓
-Day
CT= TOTAL CONCENTRATION
XA= MOLE GRACTION OS A
⑰DEFINITIONS
= =
GAS PHASE
AVERAGE VELOCITIES
MOLAR
MASS AVERAGE VELOCITY : MOLAR AVERAGE MASS
⑮
Vi
W
Umol =-
[CiVi
C
JLUXES
-
->
NA= GLUX DESINED WITH RESERENCE TO CIXED COORDINATES
->
JA =
GLUX DESINED WITH RECERENCE TO COORDINATES MOVING WITH AVERAGE VELOCITY
ISOTHERMAL ,
ISOBARIC SYSTEM :
I
EABYCA
DAB
-
SAMe
= -
~
16 C IS CONSTANT :
DA
I
NON-ISOTH-IRMAL ,
ISOBARIC SYSTEM :
EECDAB
, MASS TRANSPORT EQUATION
CONCENTRATION
BULK CLOW GRADIENT
COMPONENT COMPONENT
+NB) Ni-e
- -
De Xa
-
BINARY SYSTEM MULTI-COMPONENT SYSTEM
-> NOBUL SLOW : NATNB =0 :
W
NA=-D 0Z
-> DILUTE MIXTURE (i . e . MOST VAPOURS IN AIR) :
XAC1 AND CA +
STATIONARYI
->
STAGNANT B
:
NB
=
0 ..
A-D
NA(1 XA) -
=
-
x
↳NA=
-> USE COR INTEGRATION