THE MOLECULAR THEORY 



357 



The cases which he quotes in support of this view may be 

 represented by the following equations : 



2 H 2 + O 2 = 2 H 2 O 



I VOL 



2 VOls. 



NH 



2NH 3 



2 vols. 



N 2 



i vol. 



O 2 



i vol. 



O 2 



i vol. 



2N 



N 



HC1 - NH 4 C1 



1 vol. 



C0 2 = (NH 3 ) 2 CO 



i r/0/. 



3H 2 - 2NH 3 

 2SO 3 

 2CO 2 



2 - 2N 2 O 



<?/. 



2 = 2NO 



+ 2SO 2 



2 vols. 



+ 2 CO 



2 zW.y. 



N 2 



I Vol. 



2O 2 =2NO 2 orN 2 O 4 



He found further that the change of volume when gases 

 combine has a simple relation to their volume and quotes the 

 following cases : 



2CO + O 2 = 2CO 2 



2 vols. i vol. 2 vols. (contraction i vol.) 



O 2 



1 vol. 



CO 2 



i vol. 



O 2 



i vol. 



N 2 



ivo(, 



+ 2C 



2CO 



2 vols. (expansion i vol.) 



4- C = 2CO 



z vols. (expansion i vol.) 



+ S = SO 2 



i vol. (contraction nil) 



+ 3 H 2 = 2 NH 3 



3 vols., 2 vols. (contraction 2 vofc.) 



