Part Il. On Aqueous Solutions. 69 
| For water Ab,* is negative and the equation (4) is shown 
graphically in fig. 1 for this case. 
p,= 1 5 Simple molecules. 
l 
| 
\- 8, = 0-55, SJVAOC, 
Siena 
m9 ~-0C,6=017, a) > 00 
. =O, double molecules, 
Fig. 1. 
: The portion AB of the curve, which is nearly linear, corre- 
sponds to the dissociation of double molecules into simple ones 
between the temperatures of 0° C. and 140°C. 
: The equation corresponding to (4) when the groups are on the 
average of p-fold complexity is shown to be t 
| 
: 
eee 
| ep (et p— 1. 8,)e* 
| -(50 73 eee (G=DEF scascooet (5), 
where (P 4 5) @ =D) SC BDI1e Sp) IES Soccccee: (5’). 
We shall assume that the complex groups in solution are on 
the average of p-fold complexity. It will now be shown that 
between the temperatures of 0°C. and 100°C. the curves for 
all integral values of p are similar to the curve RABS, but lie 
everywhere above it, so that they are flatter. Near the critical 
temperature 8, 1. Substituting from (5’) in (5) and writing 
OSes 
Be ty _D4 =i. Bp) -Abp 
~#_—=C".9%.(v—b)?.e RY @ (v—b) ...(6). 
p «(1-6 
* Loe. cit. p. 246. 
+ Versl. Kon. Ak. v. Wetensch., Amsterdam, Proc., May 27, p. 86, 1911. 
+ Loe. cit. p. 98. 
