( 288 ) 



3. 1 l'^'^ 



we find the simple expressions 



... (6) 



Vk — hjc 2w hl 3w^ — 2w 



For .1? = 1 (r ^ 2) the expressions tbr y/? and n pass into those 



which are to be found in the eited pajtei' in the Areh. Teyj.ek (p. 29). 



If ,? =: or 1 (one Ivind of molecules;, m and //, duly l)ecome = 1 



and the old value 3 is found back for -. 



Ok 



</p 

 Now the value of RTk is easily tound trom (4) by putting — =0. 



dv 



Then we get: 



&^ 



RTk = ~ — ^ m, 



A6 



or (f l)ein<;' i= (1 +'^"ii) : 



V — b 



1 2a 

 RTk = (v—Oy rn. 



V — b 2?i b 3?/i' — 2n 



With = _ — , - = the last expression becomes 



V om^ r 3ïn^ 



1 2a 3m'' — 2n 4/i* 



Elk — . - • . • '^M 



l+.-c/S b 37/i- 9m' 



hence 



1 8 a H-(37Ji' — 27i) 

 RTj. = "^ ^ . . , . (7) 



8 a 

 If (i 1= 0, this l>ecomes {m = 1, n = J j A' 71- =="_—. And if p^l, 



27 bk 



18a 

 we get e. g. for ,v=i 1 (r = 2), yt7'/, = --^ - . But as then the quan- 



2 27 1)k 



titles (I and /> refer to ^/c^/z/c^-molecular ([uantities, we have ^i ^4//' and 



8 a 

 h=z'll>', hence R7)= — — as before, where a' and // now refer 



to single molecular quantities. 



Formula (7) occurs (for jj = Ï) in Teyler on p. 31 (formula (16)). 



At last the expression for pk follows from the equation of state 

 (2). The latter yields: 



