Single Unit Material Balances Chemical Reactions Worksheet Page 3
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3
4
5Choose the limiting reactant!
ξ/n
v
for the limiting reactant, dimensionless
i
i
N
/N
for limiting reactant
react
fed
Call this the (fractional) conversion of the limiting
reactant x
.
i
How to express (yield, conversion, selectivity,
stoichiometry, inerts, ..)
Yield:
Moles Forming (desired) Product/Moles Possible
Possible: limiting reactant completely reacts, no side reactions
Selectivity:
Moles Formed of desired Product/Moles of undesired
also:
Moles desired Product formed/Moles reacted
accounting for stoichiometry
What happens if an inert is present ?
Make a table:
in
out(x)
CH
2
2-x
4
O
1
1-x/2
2
HCl
1
1-x
CH
Cl
x
3
H
O
x
2
N
4
4
2
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