de, 
for w we now find for — 
dev 
0 RT ilone oi) ND ee eee 
de — ; ai aa ae v—b dx bh, v—b a 
ade. Ada dv 
Syne ae de 
U ie 
In this all the terms with — are eliminated in consequence of 
da 
the equation of state, and we keep: 
1 dw : b Ab, 1 da 
EEE Wi Ale Ee ~ 
Rode PE a ae Pee RTs de 
With regard to the quantity a, the following equation may be 
given: 
Yaa Va, +'/,(l—e) Va,='/, Va, + ella —'/, Va)=!l, Va, +aeÂVa, 
when Wa, refers to one single molecule and px, to one double 
molecule, and Aja represents the cncrease of the attraction, when 
'/, double molecule passes into 1 single molecule (atom). As for 
mercury '/, Va, 18 about =10-.. 10-2. and Vg, about=40 
Aya has there the exceedingly high value 30. 10-?, i.e. Apa three 
times the value of Wa, 
Hence from a= (Wa) follows 4/7, = 2 Wa. Ap/a, and thus the 
equation (6) becomes finally : 
1 nS 1 v—b b Ab 2a. Ava 
—| SS SS iy) Ee eles. ae 
2 Cp EE TE) © | 2 ( TO wip RTv () 
sr C.- C, 
when wecombine — — —1— log 2 to one constant (tempera- 
ET 
ture nen) C,, and write for c, and c, resp. c, =#:'/, =e) 
and = = '"/, | (1—2): ye “hs (1 + 2) 
It is now this last equation “aha serves as basis for the determi- 
nation of the degree of dissociation 7 of the double molecules, i. e. 
for the determination of the quantity = which will occur in the 
Uv 
3 2 
expressions for“? and on In the equation mentioned the quantity 
Ab, will probably be always exceedingly small, and may be neglect- 
ed in most cases, whereas on the contrary in this special case, 
where the dissociation of the double molecules Hg, leads to tsolated 
atoms Hg, Ay/a will possess. a very large value, which quite governs 
the modification of the critical quantities. 
