THOMPSON. — ON THE EQUILIBRIUM OF THE SYSTEM. 



451 



1875°, with which Rudolphi's values agrees the best of all the three 

 referred to in the Introduction. 



1400 



1500 



1000 



1700 1800 



Temperature 



1900 



2000 



Figure 3. Pressure of Carbon Monoxide Computed from the Value Deter- 

 mined at 1475° C. 



The free energy increase of the reaction taken from left to right at 

 1475° C. is 



= 4.57 X 1748 logio 927 

 = -f 23700 calories 



As the temperature rises A ^decreases till at 1920°, where the equi- 

 librium pressure equals an atmosphere, A F = 0. Above 1920° A F 

 becomes negative. 



