60 



W. G. Mixter — On Electrosynthesis. 



Ethane and Oxygen. 



The ethane used in the following experiment was made from 

 ethyl iodide by the action of the zinc-copper couple in alcohol. 

 The ethane and oxygen were measured in the eudiometers. 





Hydrogen, 2 volumes. 







Oxygen, 18 - 8 c 



. c. 







Oxygen, 



1 







Ethane, 5 c. c. 















c. c. oi. 



c. c. of 











Hours. 



Temp. 



Pres- 



Observed 



Reduced 



gas 



gas 



Reduced 



Observed 



Pres- 



Temp. 



sure. 



volume. 



volume. 



com- 



com- 



volume. 



volume. 



sure. 













bined. 



bined. 













17 



115 



136 



19-4 





23-8 



139 



138 



17 



1 



16 



93 



133 



15-4 



4 



8'9 



149 



132 



91 



16 



1 



18 



68 



129 



10-8 



4*6 



64 



85 

 75 



127 

 126 



54 



48 



18 

 18 





8*6 



153 



















Oxygen, 



16-6 c. 



c. 



















Ethane, 



8 c. 



c. 







17 



1135 



136 



19-1 







24-6 



139 



143 



17 



* 



17 



103-5 



135 



17-3 



18 



26 



22 



137 



129-5 



17 



1 



15-6 



795 



132 



13-1 



42 



7 



15 



132 



91 



15-6 



1 



16-6 



55 



130 



8-9 



4*2 



6 



9 

 1*2 



127 

 120 



57 

 8 



16-6 

 18 













102 



15*6 



Oxygen, 

 Ethane, 



13 5 c. 

 8-5 c. 



c. 

 c. 







17-6 



128 



137 



21-7 







22 



138 



129 « 



17 6 



1 



16-8 



106 



134 



17-6 



41 



5*9 



16-1 



134 



97 



17 



1 



14 6 



82 



133 



13-6 



4 



8-1 



6'4 

 12*3 



97 

 4-7 



131 

 123 



59 

 31 



14*8 



17 



One volume of ethane, C 2 H 6 , requires for complete combus- 

 tion 3f volumes of oxygen. In the experiments, however, less 

 than 2-J- were consumed. In the first, 5 CC of ethane and 11 # 3 CC 

 of oxygen (18*8 CC less T*5 CC residual oxygen) combined, and in 

 the second 8 CC and 154 cc (16*6 — 1*2). The oxidation was 

 stopped in the third experiment when 9*7 CC remained, and the 

 oxygen in the mixed gases was found to be 5 CC , leaving 4"7 CC per 

 cent ethane. Deducting these numbers from the volumes of 

 gases originally taken, we find that 3*8 CC of ethane and 8*5 CC 

 of oxygen combined ; 1*8, 1*5 and 1*5 cubic centimeters respec- 

 tively of ethane and oxygen combined to 1 of hydrogen and 

 oxygen. The rate of combination was most rapid in the first 

 with an excess of oxygen present, and during the first hour was 

 2*2 times that of the hydrogen-oxygen mixture, while in the 

 second hour it was much less owing to the large excess of 

 oxygen present. 



