Loss of Energy due to Chemical Union fyc. 



47 



Table XXV. — Positive metal, Magnesium. 

 Strength of Solution 1 equivalent weight in grains in 5115 





grains of water. 







Ingredients. E.M.F. 



Mixture. E.M.F. 



Calculated 

 E.M.F. 



Change of 

 E.M.F. 



Per 

 cent. 



Br. 22565 

 EbCl. 158726 



Br+KCl. 2-1850 



1-8604 



Gain -3246 = 



= 1745 



The solutions used in this case were 100 times stronger than 

 in Tables XXII., XXIIL, and XXIV. The electromotive 

 force in so strong a solution was very variable. 



In all the cases of Sections F, G-, H, and I only gains of 

 energy occurred. The largest gain was 27*0 per cent. The 

 amount of gain usually varied inversely as the atomic weight 

 of the halogens. 



Section J. — Halogens + Alkalies. Strong Solutions. 

 Effect of Heating. 

 Table XXVI. — Positive metal, Aluminium. 



Ingredients. E.M.F. 



Br. 1-5816 



KHO. 1-3814 



Mixture. E.M.F. 



Calculated Change of Per 

 E.M.F. E.M.F. cent. 



1-4991 



Gain -0250 = 1-66 



Br+KHO. 1-5241 

 After heating 1 minute to above 90° C. and cooling. 



I Br+KHO. 1-5101 | L4991 I Gain -0110 = "73 



The amount of change produced by heat was =a loss of 

 about '93 per cent. 



Table XXVII. — Positive metal, Tin. 



Ingredients. E.M.F. 



Br. 1-2213 



KHO. -9210 



Mixture. E.M.F. 



Calculated 

 E.M.F. 



1-0976 



Change of Per 

 E.M.F. cent. 



Loss -1480 = 13-48 



Br + KHO. -9496 

 After heating 1 minute to above 90° C. and cooling. 



I Br + KHO. -9067 I 10976 I Loss 1909=17*40 



