W. G, Mixter — Heat of Coiiibustion of Hydrogen. 223 



Experiment i?.— Gas, 1109"" at 16*2^ and 768-4"°% weighing 

 0-098 gram ; weight of like vohime of hydrogen 0*09511 gram. 

 Calculated amount of hydrogen present 0'09?89 gram. Water 

 and water equivalent of calorimeter 1706*2 gram. 



Minutes. Temperature. Temperature interval. 



17*180 — 15*332 + 0-005 = 1-853° 



Observed heat, 1706-2 X l'853 = 3l61-6" 

 Correction to calorie at 20° 2"5" 







15-330 



1 



15*331 



2 



15332 



3 



17*166 



4 



17*180 



5 



17*174 



6 



17*170 



7 



17-163 



8 



17-157 



3164*1* 

 Q=33942" 



Experiment 7.— Hydrogen, 1109*8'^" at 21-5° and 761*1™"^ ; 

 calculated weight 0*09251, observed 0*089 gram. (There was 

 evidently an error in weighing the hydrogen.) Water and 

 water equivalent of calorimeter 1728*8 grams. 



Minutes. Temperature. Temperature interval. 



18-967-17-203 + 0*007= 1*771° 



Observed heat, 1728*8 X l*771 = 3061-8" 

 Correction for calorie at 20° 1*2*' 







17-201 



1 



17*202 



2 



17-203 



3 



18-967 



4 



18-967 



5 



18-959 



6 



18-952 



7 



18-945 



8 



18*937 



3063*0' 

 Q=33727" 



Second Series. 



Experiment 8.— Hydrogen, 1109*3"" at 17*05 and 752*9"^^^ ; 

 calculated weight 0*09294, observed 0*0933 gram. Water and 

 water equivalent of calorimeter 1688*8 grams. 



Temperature interval. 

 17*129- 15*301 +0-005 = 1*833° 



Observed heat, 1688*8 X 1 •833=3095*5" 

 Correction to calorie at 20° 2*5" 



utes. 



Temperature, 







15*291 



1 



15-296 



2 



15*301 



3 



17*113 



4 



17-127 



5 



17*129 



6 



17*126 



7 



17*123 



8 



17*121 



9 



17*119 



3098*0'= 

 Q = 33932 



