183 
b—b' 
RT 
where for shortness we have put 
“— Cp + RlogR=a mA 
The comparison of (85) and (86) produces the equation 
a-—s 
RS vanen 
Ben ee 
logp = — 
a § 4 
ra hg 
or for molecules of different kinds 
di aed 
Pe opp 
Nernst’s theorem requires for every chemical reaction r,, », .. 
which is possible the relation 
28 og =, 
which is satisfied by 
Si Siw eee Serge! 
where w’v’w’ remain perfectly arbitrary. 
(86) 
(87) 
(38) 
(89) 
Da 
(90) 
(91) 
Evidently the chemical constant as calculated by means of the 
vapour-pressure formula and Nernst’s theorem contains similar inde- 
terminate contributions by the atoms as in our deduction from the 
dissociation-equilibrium. 
