234 



JONES AND SCHUMB. 



TABLE XVI. 



O'C. 



The free energy (A) of the reaction: Tl (solid) + 1/2 L (solid) = 

 Til (solid), is obtained from these potentials by multiplying by F 

 (96,500 coulombs) ; and the heat of formation may be calculated by 

 the Helmholtz equation. The results may be summarized as follows: 



25° 0° 



1.3035 volts 1.3003 volts 



Electromotive force (E) 

 dE _ 

 dT ~ 



Free Energy of Formation (A) 



« " " " (A) 



dA _ 

 dT ~ 

 dA _ 

 dT ~ 



Heat of Formation (U) 



" " " (U) 



+0.000128 volts per degree 



125.79 kilojoules 

 30 . 078 kg. calories 



125 . 48 kilojoules 

 30.005 kg. calories 



+ 12.4 joules per degree 



+2.95 calories per degree 



122. 11 kilojoules 

 29 . 198 kg. calories 



