438 W. G. Mixter — Carbon and its Heat of Combustion. 



Minutes. Temperature. Temperature interval. 



21-669 — 18-442 +0-009 = 3-236° 



Heat observed, 2543-4x3-236 = 8230'6 C 

 " of oxidation of iron — 48* c 



" " " hydrogen — 10-2 C 







18-426 



1 



18-430 



2 



18-434 



3 



18-437 



4 



18-442 



5 



21-4 



6 



21-672 





21-672 



8 



21-672 



9 



21-669 



10 



21-666 



11 



21-664 



12 



21-661 



13 



21-659 



14 



21-657 



8172-4 C 

 For 1 gram of carbon 7919-5 C 



The slight amount of silver dissolved 

 was not determined. 



Experiment <?.— Carbon 1-1136, hydrogen 0*0003, iron 0*030, 

 oxygen 10*5, water and water equivalent 2599*6 grams. 



Minutes. Temperature. Temperature interval. 



22*230 — 18-851 + 0*02 = 3'399 c 



Heat observed, 2599*6X3*399 8836*l c 

 " of oxidation of iron — 48* c 



« « « hydrogen — 11* c 







18*843 



1 



18*845 



2 



18-847 



3 



18*849 



4 



18-851 



5 



21*95 



6 



22-231 



7 



22-238 



8 



22-235 



9 



22-230 



10 



22-226 



11 



22-221 



12 



22*216 



8777*1° 

 For 1 gram of carbon 7881 *7 C 



In the next three experiments a larger german silver calori- 

 meter can was used and the bomb was lined with pure silver 

 as already described. 



Experiment k. — Carbon 1*2688, hydrogen 0*0004, iron 0*050, 

 oxygen 10, water and water equivalent 3434*8 grams. 



Minutes. Temperature. Temperature interval. 



21*315 — 18*381+0*018 — 2*952° 



Heat observed, 3434-8x2*952 = 10139*6 C 

 " of oxidation of iron — 80* c 



" " " hydrogen — 13*6 C 



" of formation of silver nitrate — 18*4 C 







18*381 



1 



18*381 



2 



18*381 



6 



21309 



7 



21*315 



8 



21-312 



9 



21*307 



10 



21*302 



11 



21*297 



12 



21*292 



10027*6 ( 

 For 1 gram of carbon 7903 -4 ( 



