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Advanced Thermodynamics for Engineers, 2nd Edition
book

Advanced Thermodynamics for Engineers, 2nd Edition

by Ali Turan, D. Winterbone
February 2015
Intermediate to advanced content levelIntermediate to advanced
578 pages
19h 27m
English
Butterworth-Heinemann
Content preview from Advanced Thermodynamics for Engineers, 2nd Edition
12.9 THE EFFECT OF PRESSURE AND TEMPERATURE ON DEGREE
OF DISSOCIATION
12.9.1 THE EFFECT OF PRESSURE
The effect of pressure on the degree of dissociation is defined by Eqn (12.62), viz.
K
p
r
¼
x
y
c
c
x
y
d
d
x
y
a
a
x
y
b
b
!
p
ðy
c
þy
d
y
a
y
b
Þ
r
It can be seen that the ratio of the amounts of substance is given by
x
y
a
a
x
y
b
b
x
y
c
c
x
y
d
d
¼
p
ðy
c
þy
d
y
a
y
b
Þ
r
K
p
r
(12.104)
This can be interpreted in the following way. If y
c
þ y
d
y
a
y
b
¼ 0 then the mole fractions of the
products will not be a function of pressure. However, if y
c
þ y
d
y
a
y
b
> 0 then the species on the
left-hand side of the chemical equation (i.e. the reactants) increase, whereas if y
c
þ y
d
y
a
y
b
< 0
then the species on the
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Publisher Resources

ISBN: 9780444633736