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

0 o 0
We have G and
0
298
H S S S S
298
Pr oducts Re ac tan ts
G 11040 298( 23.69) 3980.38
g Cal / g mol K
1 3
=46.01(45.77) + (31.21) = 23.69 g Cal / g mol K
2 2
a a a
Pr oducts Re ac tan ts
1 6.505(6.903)
2 3
6.
2
952 7.3745
b b b
Pr oducts Re ac tan ts
x
1
2 x
3
2
x
c c c
Pr oducts Re ac tan ts
0 b 2 c
3
H298 aT T T I
2 3
1 0.236x10(0.193 10
2 x
3
)(0.096 10) x
2
0.045 10
x
11040( 7.3745)298
3 7.01X10 298(
2
6
2 0.045
X10
3
3
298) I OR I = -9153.26
a b c
2 I
lnK ln T T T M and R =2 gCal / g mol K
R 2R 6R
RT
0
-3980.38
G298 RT
ln K298
or ln K 298 = = 6.6784
-(2x298)
2 2
2 3
0.613 10( 0.038 10) ( 0.046 10 ) 7.01x10 5 5 5 6
3 6
7.3745 7.01x10 0.045x10
2 9153.26
6.6784 ln298 298(298) M
2 2x2 6x2 2x298 M 11.7987
The iation of G G
0
var with T is given by, = - RT lnK
3 6
0 -7.3745 7.01x10 0.045x10
2 9153.26
G = -2T lnT T T 11.7987
2 2x2 6x2 2T
3 6
0 -7.3745 7.01x10 0.045x10
2 9153.26
G1500 = -2x1500 ln1500 1500 1500 11.7987
2 2x2 6x2
2x1500
G G G
0
1500
Pr oducts Re ac tan ts
g Cal
28488.81 g mol
The reaction is not feasible ΔG is highly +ve: For feasibility it should equal to zero