Fugacity: It is derived from Latin, expressed as fleetness or escaping ...

y
K K K K P
c c
y
n
C C
0
= (1)
203 where a,b, and c are stoichiometric co efficients
a b a b
A
B yA
y
B
0.54 X
(1.1)(0928) 1-X 1-X
2
2
2 2
-3
and K is known already = 1.8029x10 = .(1)
solving
X = 0.0382
then equilibrium Composion of C H is ( Max reversible reaction)
2 2
2 2
moles C2H2reacted 0.0382
= x 100 = 3.82%
moles of C H in feed 1
Calculate the K at 673K & 1.0 bar for N2 (g) + 3 H2 (g) 2NH3 (g).
Assume heat of reaction remains constant. Take standard heat of formation and
standard free energy of formation of NH3 at 298 K to be - 46110 J / mol and – 16450 J
/ mol respectively.
G 2( 16450) 32900 J
0
298
0
298
2 (-46110) = -92 220 J
0
G298 RT
ln K298
H
G RT
ln K
0
298 1
- 32900 = - 8.314 (298) ln K
K 564861.1
0
K2 H
1 1
we have ln
K1
R T2 T1
K2 92220 1 1
ln
584861.1 8.314
673 298
K 5.75 10
2
4
X
Acetic acid is esterified in the liquid phase with ethanol at 373 K and 1.0 bar according
to
CH3COOH (L) + C2H5OH (L) CH3COOC2H5(L) + H2O (L)
The feed consists of 1.0 mol each of acetic acid & ethanol, estimate the mole fraction of
ethyl acetate in the reacting mixture at equilibrium. The standard heat of formation
and standard free energy of formation at 298 K are given below.
Assume that the heat of reaction is independent of T and liquid mixture behaves as
ideal solution.
1
1