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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50 <br />
<br />
ln f ln<br />
9.<br />
86 10<br />
1 <br />
f=26.744 bar<br />
f 26.<br />
744<br />
0.<br />
5348<br />
P 50<br />
50 1<br />
<strong>Fugacity</strong> f<strong>or</strong> liquids and solids<br />
General expression f<strong>or</strong> fugacity <strong>is</strong><br />
P<br />
3<br />
11.<br />
4110<br />
5<br />
2 2<br />
( 50 1<br />
)<br />
2<br />
1<br />
ln f VdP<br />
RT 1<br />
F<strong>or</strong> solids and liquids at constant temperature the specific volume does not change<br />
appreciably with pressure, theref<strong>or</strong>e the above equation <strong>is</strong> integrated by taking volume<br />
constant. Integrating the above equation <strong>from</strong> condition 1 to 2<br />
f2<br />
ln f <br />
f1<br />
f<br />
V<br />
RT<br />
V<br />
P2<br />
<br />
P1<br />
dP<br />
P <br />
2<br />
ln 2 P1<br />
f1<br />
RT<br />
Problem:<br />
Liquid chl<strong>or</strong>ine at 25 o C h<strong>as</strong> a vapour pressure of 0.77Mpa, fugacity 0.7Mpa and Molar<br />
volume 5.1x 10 -2 m 3 /kg mole. What <strong>is</strong> the fugacity at 10 Mpa and 25 o C<br />
P<br />
1<br />
P<br />
2<br />
6<br />
0.<br />
77 10<br />
Pa<br />
1010<br />
f<br />
V<br />
6<br />
Pa<br />
P <br />
2<br />
ln 2 P1<br />
f1<br />
RT<br />
f=0.846Mpa<br />
f<br />
1<br />
6<br />
0. 7 10<br />
Pa T 298K<br />
R 8314<br />
J<br />
Kgmole
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