Summary
Process Engineering Fundamentals Notes/Summary
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Notes and summary for Process Engineering Fundamental modules. Can use this document along with some past exams.
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Revision,Mass & Volume
Density (p) =
# , Clgris , gam Ibuft , ,
etc. )
↳ Independent of Pressure <PL
Specific Volume =
In [inverse of density]
Specific Gravity : ratio of
substance
and
Preference
: 36/5 :
↳ usually
Po
: 1000
gris
Mass & Volumetric Flowrate
rata at which fluids line
Flowrate = moved through a
process .
↳ nasflorrtee
-
Depart we i re
↓
density can be used to convert i to in or vice versa .
,Mass and Mole Fractions
↳ use to determine the amount of composition A from the whole mixture
has ofi
&
Mass fraction :
<A =
-100 to
get percentage
Mole fraction :
JA
:
Moles of is
Flow rate car be calculate from mass/mole fraction o
solution contains A
by stream A flow rate!
ex .
a 15 % mass
,
of solution
Howing at 53lbnd" ,
151bm
= 0 A
flow rite of A Ibm i
A
.
* = 8 . 0
a solution contains 20 mole % B
,
molar flow rate of B = 28 tmols"
,
total solution Hou rate &
solution flow rate =
28 -
knol B
x
1Imol total =
140 kmdls
S 0 . 2
kmB
* It is
very important to choose or set the BASIS
very carefully because it can reale problem
much easier .
A
ex
. 0 15 %
.
by mass
basis of total A
100 g 15g
>
-
, Average molecular weight (M)
↳ ratio of mass of a
sample of mixture to number of moles of all
species
(confused
#
With mass traction :
* = +
...
With mole fraction :
n
y Mc
M +
y
= + ...
,
, ,
ex
. Calucko it of air : molar composition 79 % N2 21 % 0 , and mass
composition 76 7%
N2 23 3% 03
,
. .
,
with traction 767gNc U trtuly 02/ total mol
#
: 0 035
233
mass
g g
.
= . ·
=
+
q
g N2/mol
32
28 g N2/mol
M =
0 .
05 = 29
grol
with mole fraction M not
- Nz 0 21 not
- O2
289 N2
32902
: 0 79
29 gr
= .
.
X + X
=
mo ImolNz
- mol
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