Fugacity: It is derived from Latin, expressed as fleetness or escaping ...
Fugacity: It is derived from Latin, expressed as fleetness or escaping ...
Fugacity: It is derived from Latin, expressed as fleetness or escaping ...
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d ln<br />
xi<br />
dx<br />
1<br />
F<strong>or</strong> binary system<br />
d ln<br />
1 d ln<br />
x1<br />
x2<br />
dx dx<br />
1<br />
i<br />
0 ----------------(9)<br />
1<br />
2<br />
0 ---------(10)<br />
x d x d ln<br />
0 -----------(11)<br />
1<br />
ln 1 2 2<br />
Equation (9) (10) and (11) are Gibbs Duhem equation in terms of activity coefficients<br />
F<strong>or</strong> ideal vap<strong>or</strong><br />
f i Pi<br />
From equation 5<br />
d ln Pi<br />
xi<br />
0 ------------(13)<br />
dx<br />
F<strong>or</strong> binary system<br />
1<br />
d ln P1<br />
d ln P2<br />
x1 x2<br />
0 ----------(14)<br />
dx dx<br />
1<br />
1<br />
x d P x d ln P 0 ---------------(15)<br />
1<br />
ln 1 2 2<br />
Equation (13) (14) and (15) are Gibbs Duhem equation in terms Partial pressure.<br />
F<strong>or</strong> ideal vap<strong>or</strong><br />
P1 y1PT<br />
, P2 y2<br />
PT<br />
x1d<br />
ln( y1PT<br />
) x2d<br />
ln( y2<br />
PT<br />
) 0<br />
x1d<br />
ln y1<br />
x1d<br />
ln y2<br />
( x1<br />
x2<br />
) d ln PT<br />
0<br />
x x 1<br />
1<br />
x d<br />
1<br />
2<br />
ln y1<br />
2<br />
x1d<br />
ln y d ln PT<br />
0<br />
dP<br />
<br />
x1d<br />
ln y1<br />
x2d<br />
ln y<br />
P<br />
2
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