and of Combustio7i of Acetylene, Ethylene and Methane. 355 



Minutes. Temperature. 



Water and water equivalent of 

 calorimeter, 3252 grams. 



Temperature interval, 



2-783 - 0-24 + 0024= 2'567° 



3252 . 2-567 = 8348 c 

 Deduct for hydrogen 109 c 







0-239 



3 



0*240 



6 



0-240 



9 



2-801 



12 



2-783 



15 



2-769 



18 



2-753 



21 



2-739 



24 



2-724 



8239 c 

 and for 28 grams of ethylene, 344,800° 



The bomb leaked at the valve after exploding in 14th experi- 

 ment. The result was 340,400 calories. 



Experiment 15. — 602 cc of gas (97*2 per cent ethylene) at 

 21-6° and 762 mm pressure, containing 0*685 gram of ethylene, 

 was mixed with the excess of oxygen. Jacket, 3° ; room, 5°. 



Minutes. Temperature. 



Water and water equivalent of 

 calorimeter, 3252 grams. 



Temperature interval, 



4-41— 1-835 + 0-007 = 2-582° 







1-813 



3 



1-824 



6 



1-835 



9 



4-410 



12 



4-410 



15 



4-400 



18 



4-400 



21 



4-394 



24 



4-393 



The heat of combustion of 28 grams of ethylene from these 

 data is 343,400 c . 



Experiment 16. — 602 cc of gas (97 per cent C 2 H 4 ) saturated 

 with water vapor at 19-4° and 760'4 mm , containing 0-67 gram 

 of ethylene, was exploded with an excess of oxygen. 



Water and water equivalent of 

 calorimeter, 3252 grams. 



Temperature interval, 



3-394 — 0-860 + 0-012 = 2'546° 



inutes. 

 



Temperati 

 0-857 



3 



0860 



6 



0-860 



9 



3-398 



12 



3-394 



15 



3-389 



18 



3-380 



21 



3-388 



24 



3-370 



27 



3-360 



30 



3-351 



From these data we have 345,700 c 



