SPECIFIC HEAT OF AMMONIA. 



397 



Keyes gives a table of values of the specific volume of the liquid,^^ 

 V2, at various temperatures as shown in the table below; 6 in °C. and 

 V2 in CCS. /gram. 



The following empirical equation was set up by the writer to repre- 

 sent ?)2 as a function of d. 



V2 = 1.49380 + 0.079723T - 0.014021 r^ + 0.0074209x3 

 - 0.00132917 T* + 0.0001075 r^ 



where r = (^/20 + 1) (35) 



By differentiation, the values of —^ are obtained. These values of — - 



dd ad 



in ccs./gram-degree for each 10° C. as computed from (35) are given 



below. 



21 Reference (3j p. 15. 



