972 



CP X — 



rz: A- or — = «e y , 



in ) 



V 1 

 in which a is constant. If, further, we put -==— the well known 



q n 



adsorption isotherm 



is formed. 



«c« . 



5. This isotherm is generally a parabolic curved line that runs 

 through the origin and the point (l(z). From the value 



X \ 1 



m) 1 /I ^c~ 



- =: «— . I 1 



dc^ n \n 



we notice that the isotherm will turn the convex side towards the 



c-axis, when 1^0, and the concave side when 1<^0. 



11 n 



1 



The transition case lies at 1=0. 



n 



In the subjoined tigure the course of the curve has been drawn 



1 



for different values of - . 



11 



j: 



