380 Specific Heats of Ammonia, Sulphur dioxide, etc. 



Table VII. 

 Carbon dioxide. 1 atm. 



1 



Author. '*° C. 



1 

 i 



X/2 CO, 

 in cm. 



X/2 air 

 in cm. 



i 



1 , K = 



K . | 0. C p /C v 



; corr. 



g. cal. 



% ! C, i 

 g. cal. g. cal., 



8-77 ; 6-73 ; 



Tbibaut ...j 15 



7-404 



9518 



1-288 1-0116 11-303 



2-039 



Scholer ... 20 



7-397 



9-505 



1-290 10110 11-303 



2-037 



8-76 ; 6-72 i 



Schweikert. 



u C0 2 = 

 257-6 m. 



u air= 

 331-9 m. 



1-283 .1-0139 1-301 



2-048 



8-85 6-80 



I ' 1 



Cant and 



per sec. 



per sec. 



" 1 ! 





i 1 



Partington. 20 



6-378 



8-195 



1-290 1-0110 1-303 



2-037 



8-76 6-72 | 



I 



Summary of Results. — The ratio of the specific heats 

 fc = c p /c v ammonia, sulphur dioxide, and carbon dioxide have 

 been determined by a method depending on the relative 

 velocities o£ sound in the gases and in air. The specific 

 heats were calculated. Berthelot's equation of state was 

 used in all calculations. The following results were obtained 

 at 1 atm. pressure. 





Table VIII. 







Ammonia at 

 14°-5 C. 



Sulphur dioxide 

 at 13°-2 C. 



Carbon dioxide 

 , at 20° C. 





1/308 



8-77 g. cal. 

 6-70 g. cal. 



1-290 



9-47 g. cal. 

 7-34 g. cal. 



1-303 



cl , 



8 - 76 g. cal. 

 6-72 g. cal. 



p 

 c 





The authors wish to express their thanks to the Department 

 of Scientific and Industrial Research for a maintenance 

 grant to one of them (H. J. C), and to the authorities of 

 East London College for a grant which contributed to de- 

 fraying the expense of the work. The experiments described 

 were submitted as part of a. Thesis for the degree of M.Sc. 

 of London University by H. J. Cant. 



East London College, 

 University of London. 



