AMMONIUM BICHROMATE. 417 



Or for 1 kgra. 



88-6 litres (l + \ the water liquid; 



44*3 litres (1 4- 970)' ^e wa ^ er gaseous. 



6. Theoretical temperature, at constant volume (the chromium 



40400 

 oxide solid), -f = 1300, or, more accurately, 1300 



ol'l 



JL 

 311: 



7. Permanent pressure at 0, taking into account the volume 

 of the liquid water and of the chromium oxide (density -f 5 "2) 



88-6 atrn. ^ 91*6 kgm. 

 n - 0401 ( r n - 0401* 



For n = 1, we have 153 kgm. per square centimetre, a much 

 lower pressure than that of the foregoing bodies. 



At a high temperature, the vaporisation of the water tends to 

 increase fivefold the pressure which would be attributable to 

 nitrogen alone. 



Hence, at the theoretical temperature of the decomposition, 

 we should have the pressure 1 



273 / 2570 atm. 2656 kgm. 

 or 



n - 0116 " n - 0116 ' n - 0116 



For n = 1, this figure is increased to about 2990 kgm. 

 All these values are much lower than those relative to the 

 foregoing bodies ; that is, ammonium nitrate and perchlorate. 



1 Neglecting the quantity q> 



2 E 



