410 Dr. W. A. Tilden. Influence of Temperature [June 18, 



Potassium Nitrate, KN0 3 , in 100 molecules of Water, or 101 1 parts 

 in 1800 parts by weight. 



Weight of Salt used . . 

 Weight of Water used . . 



Specific Heat of Solution KN"O 3 100H 2 O= *942. 



4 '774 grams. 

 ..85 



Number 

 of 

 expt. 



Water 

 equiv. 

 calorim., 

 &c. 



Tempe 



Eefore 

 solution. 



rature. 



After 

 solution. 



Correction. 



Total 

 fall. 



Molecular 



beat of 

 dissolution. 



54 



116-8 



15-55 



12-30 







3-25 



8028 



55 



116 -7 



15-50 



12 30 







3-20 



7906 



56 



116-7 



34-42 



31-30 







3-12 



7703 



57 



116-7 



34-61 



3139 



- -006 



3-214 



7926 



58 



116-7 



52-72 



49-60 



- -015 



3-105 



7662 



59 



116-7 



53-88 



50-87 



- 004 



3-006 



7421 



Mean. 



Approximate Heat of 



temperature. dissolution. 



15° -7967 



34 -7814 



53 -7541 



From the values C=23'2 (Kopp), 18w-j-K=l791 (Thomsen), and 

 Q<=-7967 at 15°, Q x = -6751 when T=53°. 



Sodium Nitrate, NaN0 3 , in 100 molecules of Water, or 85 parts in 

 1830 parts by weight. 



Weight of Salt used . . . . 4 '013 grams. 

 Weight of Water used . . . . 85 '0 



Specific Heat of Solution NaNO 3 .100H 2 O= '950. 



Number 

 of 

 expt. 



60 

 61 

 62 

 63 



Water 

 equiv. 

 calorim., 

 &c. 



Temperature. 



Correction. 



Total 

 fall. 



Molecular 



beat of 

 dissolution. 



Before 

 solution. 



After 

 solution. 



116-8 

 116-8 

 116-8 

 116-8 



16 30 

 16 -05 

 54-42 

 54-80 



14-36 

 14-15 



52- 67 



53- 09 



- -003 

 + -040 



- -004 



- '002 



1-937 

 1-940 

 1-746 

 1-708 



4776 

 4796 

 4306 

 4204 



