36.2.1 |
Gibb’s Adsorption Isotherm (contd..)
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At constant temperature and pressure, above equation reduces to, |
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Comparing equation (36.2.3) and (36.2.5), we get |
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A corresponding equation for the bulk of the system may be, |
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Where  and  are the number of moles of adsorbent liquid and solute in the bulk. From the equation (36.2.6) and (36.2.7), we get |
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Here, the term  represents the corresponding excess moles of solute per unit area on the surface of the adsorbent and now be represented by
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The chemical potential of solute  RT ln a2
or  RTd ln a2
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= 
