302 
been found from compounds. Hence the value used for y is possibly 
somewhat too great. 
As pw, = 973 392 >= 2,482, we: get: 
fit, 1,725 X 2,482 — 4,28 
With regard to the value of Vaz it may be stated that this value 
can only be calculated with any certainty from 7%, when the 
molecular state is known there. Now we onlv know (see PREUNER 
and Scuupp, Z. f. ph. Ch. 68, p. 129) that sulphur vapour consists 
of molecules S,, S,, S,, and S, at different temperatures; between 
500° and 800° C. chiefly of S, ‘and S,-molecules. [At lower tempe- 
ratures more and more S,-molecules occur, aud only at very high 
temperatures — according to v. WarTENBERG (Z. f. ph. Ch. 77, p. 66) 
not before about 2000° C. — atoms S,}. From the formula for 7% 
follows with bj, = 125.10-°: 
ay 973. 5< 125, 1027s 180 np == 1980). AOE? Eng; 
because @ (the correction factor for 2, about which we spoke above, 
oa re 
and which is evidently = ih (A) )is = 0,9866. As now 6,3.10— 
; 8y—1 \y+1 
has been found for az, from compounds, and a;,, therefore becomes 
— 39,7.10-4, nz would become = 3,98 — which therefore practically 
means that sulphur at the critical temperature would on an average 
consist almost entirely of molecules S,. *) If however Wa, should 
be =5.10-2, nr would become = 6,32, and chiefly S,-molecules 
would be present. 
In order to find out something about the attraction of sulphur in 
compounds, we have examined also S,Cl,, SOCI,, and 50,CI,. We 
find successively : 
TE 104a, 1021 ap 
lesnnes k | | 
| 
| | | | ERE See 
S,Ch | 664,4? |2X1252X115=480| 4087 | 22 | S=4,7 10-2 
| | 
SO Cly. | 5699" "| 125 4-10 4-20 425 | SIOE 176, Aln 
SO,Cl | 549,7 |125+1404230=495 | 348,1 | 18,7 On 25 
| | 
If for Cl we take the value 5,4.10-? and for O the value 2,7.10~-?, 
we find for S the above given values, which are all smaller than 
the fundamental value 6,3 found for H,S and SO, In the two first 
compounds the attraction is, however, not far from the normal 
fundamental value 5, it being about half this value for the last 
compound. 
1) Le. such a mixture of S,- and S,-molecules that on an average nk is = 4. 
