Page 140 - Elements of Chemical Reaction Engineering 3rd Edition

112 Rate Laws and Stoichiometry Chap. 3

The relative rates of reaction are
1 rA - rE - rc - rD I (2-20)
d
c
-a
-b
5. In the case of ideal gases, Equations (S3-3) through (S3-6) relate vol-
ume and volumetric flow rate to conversion.
Batch constant volume: V = Vo (S3-3)
T
Batch variable volume: V = Yo (S3-4)

T
Flow systems: u = uo (1 + EX) - (S3-5)
TO
where the change in the number of moles per mole of A fed is
I ‘=YA08 1 (S3-6)

and the change in the number of moles per mole of A reacted is

b
c
d
i8=;+;-;-1
(S3-7)
6. For the ideal gas-phase reaction
b C d
A+-B __j -C+-D
a a a
the volumetric flow rate is

(S3-8)

Using the stoichiometric table along with the definitions of concentra-
tion (e.g., CA = FA/u), the concentrations of A and C are:

(S3-10)

7. When the reactants and products are incompressible liquids, the con-
centrations of species A and C in the reaction given by Equation (2-2)
can be written as