SPECIFIC HEATS OF SOME COMPOUND GASES. 







TABLE XXII. 
| 
dee 
t l. 1 p. 1+ i Tp P: "f Bp. 
| 
18-2 37-92 48:84 1529 1:007 1:306 
181 37-97 48:83 Sy a 1311 
Geez) )| 87.02 48:75 1312 
| 14-7 37-65 48:53 1:304 
11-9 37-48 48-28 1:306 
12-6 37°57 48-34. | 1:310 
| Mean. . ; 1:308 1-224. 




Previous determinations of the ratio of the specific heats of carbon dioxide have 
given the following results :— 


| 
| t. Yy 
1-291 
| 19° 1:305 
20-25 1-292 
0 L311 
100 1-282 
0-34 1:265 
1:29 


Observer. 

Cazin (‘ Ann. de Chim.,’ 56, 206) 
Rontcen (‘ Pogg. Ann.,’ 148, 580) 
De Luccut (‘ Nuov. Cim.,’ 11, 11) 
Winer (‘ Wied. Ann.,’ 4, 321) 
Mirer (‘ Wied. Ann.,’ 18, 94) | 
Jamty and RicHarp (‘Comptes Rendus,’ 71, 336) 


All these observers have used the 
would be 1°299 without the correction for deviation from Boyvie’s Law. 
equations of a perfect gas. 
§ 12. Carbon Bisulphide (CS,). 
My own result 
The liquid was first distilled from lime over which it had stood several days. It 
was then shaken repeatedly with mercury, dried with calcium chloride, and redistilled. 
As the determinations of the absolute vapour density give an unsatisfactory curve, 
two of the experiments giving values rather more than a tenth per cent. away from 
the curve through the other three, a separate experiment was made to find the 
relative densities in the usual way. The results of this experiment are shown in 
Table XXIIL., and fig. 8. 
TABLE XXIII, 



1b p v. | pv/T. 
| 
286°7 1233 118°6 49°56 
| 170 §5°8 49-48 
197°9 73:6 | 49°38 


