110 ROYAL SOCIETY OF CANADA 
When determining the heat of solution the lamp was removed 
from the calorimeter, the water value of the latter was then found to 
be 11-64 calories per degree. The heat of solution was determined 
by placing a weighed quantity of the solvent in the calorimeter, and, 
after it had attained a steady temperature, running into it a certain 
amount of the solute of the same temperature from a water-jacketed 
tube. The quantities were so chosen as to give a final volume of 
approximately 260 c.c. in each experiment. The mixture was stirred 
rapidly for + minute and a reading taken. Several successive read- 
ings were taken at intervals of + minute. The calorimeter was then 
weighed, the difference giving for large quantities of solute the amount 
taken. In making the more dilute solutions 5 c.c., 3 c.c., 2 c.c., and 
1 c.c., pipettes were used. The specific heat of the solution was 
then determined as in the case of a pure liquid. The results are 
expressed in the following manner — the number of grams of solvent 
to 1 gram molecule of the solute is calculated for each degree of 
dilution and the corresponding number of calories. 
I. ALCOHOLS IN BENZENE. 




Solute Solvent Sp. Heat Cal. 
Methyl alcohol’. ..2-1 1-00 o- 78.2 gr. 0°481 241 
EbhylalcohOL "PRE Ties CC 0-511 403 
n-Propyl alcohol) sc) EEE 635 “ 0491 317 


II. ALCOHOLS IN TOLUENE. 


Solute Solvent Sp. Heat } Cal, 

Methyl alcohol. 7-7". 3.-..--- 91°6 gr. 0°473 237 
HMthylaleonol. ECC CE 90: "2 0.495 374 

III. METHYL ALCOHOL IN M-XYLENE, 

Solute Solvent Sp. Heat Cal. 


Methylalconol-#77""""172 99°3 gr. 0°469 260°5 


IV. ALCOHOLS IN ETHYL ACETATE. 


Solute Solvent Sp. Heat Cal. 

Methyl' alcohol FPE ee ite. 90 gr. 0°497 421 
Ethylalcoholvees EE sees 87 5104 0°515 566 

