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



Minutes. 







1 



2 



3 



4 



5 



6 



7 



8 



9 

 10 

 11 

 12 

 13 



Temperature. 



Experiment J^. — Carbon 1*361, iron 0*032, silver dissolved 

 0*013, oxygen 10*5, water and water equivalent 3511*5 grams. 



Temperature interval. 

 21*848 — 18*786 + 0*008 = 3*070° 



Heat observed, 3511*5X3*07 = 10780*3 C 

 " of oxidation of iron — 5 1 *2 C 



" of formation of silver nitrate — 2*7 C 



18 

 18 

 18 

 18 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 21 

 21 



777 



780 



783 



786 



8 



853 



853 



851 



848 



845 



843 



841 



839 



838 



For 1 gram of carbon 



10726*4 C 

 7881*3 C 



Experiment No. 

 1 

 2 

 3 

 4 

 5 

 6 

 Average 



Summary of Results. 



First series. 

 7869 

 7919-5 

 7881*7 

 7903*4 

 7888*8 

 7889*4 

 7892* 



Second series. 

 7919*6 



7895 



7885*7 



7881*3 



7895*4 



The mean of the results of the two series of experiments is 

 7894 calories for the heat of combustion of one gram of 

 acetylene carbon at constant pressure and volume and at 

 about 20° and in terms of the water calorie at this tempera- 

 ture, and for 12 grams it is 94,728 calories. 



