277 
But in all cases of association (n > 1 <2) @ will be a function 
of x, and besides of the contractions Ab and Aya, if they exist. 
As we stated above, this factor can become pretty large, e.g. 1,3. 
BT, aie . . 
Pron), ———— anai —, after substitution of the above-mentioned 
Ve Ve 
Maloe of 27, and of Vv, = nv De nb a= Hd, we find for ps: 
j “Gs, 84 21 Fe ee! ac 3 
ome ea oe ee 75 eet enc 
when besides 7}, is substituted for v. Then with »=2 the factor ar 
Be Oe en We eae ati bm 
nx) just as 
becomes therefore = 
1 
0, the factor of RT, — i.e. in the normal cases (n = 1 and 2). And 
8 27 
if then r=8, in which 6=1, then a becomes also = IT ie 
But for n>1< 2 a will again be a function of z, Ad and 
Ava, and in general much greater than @. If e.g. 6 = 1,363 (see 
§ 8), r=2, then a becomes — 10,91—6,75 = 4,16, so that a is 
more than three times as great as 6. The critical pressure will then be 
28 
416 = 4,3 times greater than the normal value for 7= 2, when 
there is no association, in which case a = 6 ==". 1). 
From (1), (2) and (3) the following equation follows now further 
Wit ve = 2ve— n X roe: 
RTS 8256 
gh ee EN 
PeVe 1 a 
in which s’ =s:n (where s refers, therefore, to v. per Gr. atom). 
Now we do not find rs’ = 8 as in normal cases — but 
0 | 
re =S AEN oe een 
IU 
in which 6: can be '/, in some cases (see above). In consequence 
of this s’ may be reduced from 4 (the normal value for r= 2) to 
4:3=1,3, ie. to the third of this normal value. (See the table in 
80 rat) 
1) We found before that in normal cases 6 =z. Then 6 See Aah from 
r— r 
2, : : . : 
which A=6= ce Ca When in this (l +): is substituted for r, in 
:(r—1) — 
which y represents the reduced coefficient of direction of the straight line between 
8y—1\y+1 
derived by me, yielding A=1 for r=3(y =0,5) and A = 27/9. for r = 2 (y = 1). 
27 2 
De and !/, Dy in a D,T7-diagram, we find back A= ( u ) , the formula 
