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 ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
P<br />
ln<br />
P<br />
2<br />
1<br />
P2<br />
<br />
ln<br />
<br />
760<br />
<br />
1<br />
<br />
R T1<br />
<br />
1<br />
T<br />
2<br />
<br />
<br />
<br />
41.<br />
27 10<br />
8.<br />
314<br />
P2 634.<br />
3mmHg<br />
3<br />
1<br />
<br />
373<br />
<br />
1 <br />
368 <br />
<br />
Ph<strong>as</strong>e Equilibrium in Multi component system<br />
An heterogeneous system contains two <strong>or</strong> m<strong>or</strong>e ph<strong>as</strong>es and each ph<strong>as</strong>e contains two <strong>or</strong><br />
m<strong>or</strong>e components in different prop<strong>or</strong>tions. Theref<strong>or</strong>e it <strong>is</strong> necessary to develop ph<strong>as</strong>e<br />
equilibrium f<strong>or</strong> multi component system in terms of chemical potential.<br />
The partial molar free energy <strong>or</strong> chemical potential <strong>is</strong> given <strong>as</strong><br />
G<br />
<br />
i<br />
Gi<br />
<br />
ni<br />
T , P,<br />
n j<br />
F<strong>or</strong> a system to be in equilibrium with respect to m<strong>as</strong>s transfer the driving f<strong>or</strong>ce f<strong>or</strong><br />
m<strong>as</strong>s transfer( Chemical potential) must have unif<strong>or</strong>m values f<strong>or</strong> each component in<br />
all ph<strong>as</strong>es.<br />
Consider a heterogeneous system cons<strong>is</strong>ts of ph<strong>as</strong>e , , and<br />
containing various components 1,2,3-------C , that constitutes the system.<br />
k<br />
i<br />
The symbol represents chemical potential of component “i”in ph<strong>as</strong>e k.<br />
At constant temperature and pressure, f<strong>or</strong> the criterion f<strong>or</strong> equilibrium <strong>is</strong><br />
dG=0 ----(1)<br />
Free energy f<strong>or</strong> multi component system given by the expression<br />
SdT VdP dG ------(2)<br />
<br />
i i dn<br />
At constant Temperature and pressure<br />
dG ----(3)<br />
i i dn<br />
Comparing equation 1 and 3<br />
0<br />
<br />
i i dn<br />
F<strong>or</strong> multi component system<br />
C<br />
<br />
<br />
i1 k <br />
<br />
k k<br />
i i dn<br />
0<br />
Expanding the above equation
Change language