365 



In the same way we get for: 



CBf. 



v,(iG^ — v,(i'G^=v,KTln— (14) 



SO that equation (9) now assumes the following form : 



2 {vii)s = 1', RTIn — ^ + V, RThi —± . . . (15) 



Now we can apply the same considerations for the case that the 

 homogeneous phase, in which there is internal equilibrium, is a 

 solution (second process); then we get instead of equation (15): 



Cb. C'a. 

 S (r(4),s = Ï', RTln -^ + V, RTln . . . (16) 



As ^ (ff )s has the same value in the two cases, the second 

 member of equation (15) will be equal to the second member of 

 equation (16). 



Then follows from equation (15) and fl6), that: 



^ = -^.—1:^ (17) 



The concentrations provided with accents indicate the internal 

 equilibrium concentrations, and those without accents the saturation 

 concentrations. 



Let us suppose that we have to do with isomers, then : 

 r, =!>,=: 1, 

 hence : 



C'Ar Ca^ C'a Ca 



C'b, Cb/ C'b ' Cb ^ ' 



L L (J ;; 



This equation is the same as equation (16) in the lirst communi- 

 cation. ') 



If we have the case of polymery, and if e.g. 



fi = 2 and r, = 1 



the general equation (17) passes into:" 



CZir Ca, C'a Ca 



C'b, Cb, C'b ' Cb ' ' ' ^ ' 



') See preceding communication p. 361. 



