CHAP. 8: CHEMICAL EQUILIBRIUM [CONTENTS] 242
gaseous phase
K∗ ∗ Comments
∏k
i=1
nνii
(
p
pst
∑k
i=1ni
)∆ν
For a mixture of
ideal gases
Used for almost ideal gaseous sys-
tems. The equilibrium constant
does not depend on pressure, the
composition does.
∏k
i=1
xνii
For an ideal mix-
ture of real gases
Both the equilibrium constant and
composition are the function of
pressure.
∏k
i=1
(c
i
cst
)νi
For a mixture of
ideal gases
Used particularly in connection
with chemical kinetics.
liquid phase
K∗ * Comments
∏k
i=1
nνii
(
1
∑k
i=1ni
)∆ν
For an ideal so-
lution
Used in the thermodynamics of
non-electrolytes.
∏k
i=1
nνii
(
1
∑k
i=1ni
)∆ν
For an ideal so-
lution
It applies thatγi=γi∞·γi[x],
whereγi∞= lim
xi→ 0
γi.
∏k
i=1
cνii
( 1
cst
)∆ν
For an ideal so-
lution
Used in the thermodynamics of so-
lutions of electrolytes (dissociation
constants, solubility products).
∏k
i=1
mνii
(
1
mst
)∆ν
For an ideal so-
lution
Used in the thermodynamics of the
solutions of electrolytes.
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