616 
in which the quantity 8 changes every moment, namely between the 
limits of integration 3, and 3, during the integration (see also p. 5 
of the paper in the Chemisch Weekblad). 
But on account of this variability of 8 the calculation of (1°) is 
rather laborious. because now also 2 as a function of v and 7’ is to 
be substituted, and the integration can then give rise to difficulties.’) 
3. It is therefore of importance to sketch a second method of 
calculation of Woz, in which the said difficulty is evaded. There is, 
of course, not the slightest objection to the method discussed just 
now; against the method that will be given now an objection may 
be raised, though it leads to correct results, as Dr. HOENEN admitted. 
We have namely also: 
ow òw\ dp 
== = ne s lv, 
(ie ) Fil | ce 
DANE | | 
Wro, — w Vo 
in which, therefore, in the case of expansion to a very large volume 
V the degree of dissociation B is kept constant, viz. equal to that of 
the condensed mixture 8, which is in internal equilibrium. Now we 
Ow ’ 
do not have ( —( under the integral sign, for during the 
2 
08 
Ree : d3 
expansion the internal equilibrium 1s disturbed, but — = 0, be- 
av 
cause 3 remains constant. Just as above we have also here: 
Vio 
7 Ow / 
aD. e= S| UUR Ey AM ee GG 2a 
| 02/70 YY 3/70 Ov 6 ? ( ) 
"03/20 
Op ; ; ; : : 
or also, a being again —— p, after substitution of the value 
VU 3 
Ii 
Vo it 
je Eo ol Jat de 
Weg, zo == yp Vo { i ws ale RE) a dv 2 à = E (26) 
(9) vs 
V0/%0 
That (14), to which no objections can be raised, and’ (2°) against 
which an objection might be advanced lead to entirely identical results, 
I have demonstrated in the cited paper in the Ch. W. (p. 7—8), 
which furnishes at the same time an direct proof also of the 
‘) For also a and b are still functions of 8. 
