194 



PROCEEDINGS OF THE AMERICAN ACADEMY, 



Heat capacity data, (in terms of water equivalent) 

 Heat capacity of acid = x 



Calorimeter system = 12.60 gms. 



NaOH ^ = 17.83 " 



H2SO4 (114.87 gms.) =109.13 " 



Total heat capacity = = x + 139 . 56 

 Then heat evolved equals (x -\- 139.56) X 4.233 = 2493.4 cal. 



TT A if^ A- calories 



Hence, x = 449.4/ ^j 



degrees 



But the weight of HCI.IOOH2O actually taken in the calorimeter 

 was 466.54 grams. Hence its specific heat 



_ heat capacit}^ _ 449.47 _ 



heat capacity of equal weight H2O 466.54 



Immediately below is tabulated a series of determinations of this 

 kind, giving all the necessary data. 



TABLE IV. 

 Series Concerning the Specific Heat of HCl. 100 HO. 



