98 



In the series of the normal fatty acids the difference 

 between the boiling points of the lower members is also 

 constant, being 22°, but afterwards it becomes less. 



Acetic C2H4 Oo 



Propionic CgHe 0^ 



Butyric C^Hg Og 



Pentyhc C5H1A 



Hexyhc CqRi^Oo 



Heptylic C,Hi,0, 



Octylic C.HieOo 



Nonylic CgHigO^ 



Normal Fatty Acids. 



Observed. Calculated. 



118° ... 118° 

 140-6 ... 140 

 163-2 ... 162 

 184-5 ... 184 

 204-5 ... 206 

 220 

 233 

 254 



Difference. 



22 

 22 

 22 



