( THE J 
By the aid of the condition- of equilibrium and the condition 
n, + 2n, = 0, we easily see that the sum of the two last terms is 
0, so that we find: 
P_n, +n, 
ae 
Now we introduce the special supposition that y,, is the same 
for the whole region w; then we have: 
Zu AU Zu 
aa BE OR x 
k,= | — dw 22 =| a ‚9 
4a ‘ r 
We shall eall w,,, which represents a volume, the reduced volume 
of the chemical region of attraction, or shorter the chemical volume 
of the atom. 
Now we find for W: 
ia 5 
3 
i ae log Aan — etl log (2%Om) + (n,4+-n,) log V — 
n, 
—n,logn, —n, logn, —n, — n, log 2 + — 
a +n, log w,,. 
On an average the kinetic energy for the ensemble amounts to 
5 HO; so the potential energy, which is equal to that of the most 
ad 
frequently occurring system amounts to — #,4,,; hence the statistical 
te eas 
entropy 7 Tee ee by: 
RAT} 3 
n= + nlog Aan + Pi log (2% Om) + (n, + n,) log V — 
— n, logn, —n, logn,—n, log 2—n, + n, log w,,, 
a formula which yields the desired generalisation of the cited formula 
for the case under consideration. 
11. In this communication we shall now still briefly treat the 
case of the dissociation of the type: 
2HIÈI, + A, 
i ren 
H,2H+H 
Concerning the action of the chemical forces we make analogous 
suppositions. The action of / on /, and of H on H, as well as 
that of J on H is deseribed by the aid of regions of attraction 
Ws Ws, and w 
‚5, the mutual potential energy, which is again as- 
sumed to be independent of the direction of the axes characterized 
