Loss of Energy due to Chemical Union §c. 

 Table XX. — Positive metal, Magnesium. 

 Strength of Solution same as in Table XIX. 



45 



Ingredients. E.M.F. 



HC1. 

 H 9 S0 4 . 



HNO ? . 

 Formic acid 



2-0134 

 20162 

 1-98-18 

 1-6130 



Oxalic acid. 17274 



Mixture. 



E.M.F. 



H 2 S0 4 +2HC1. 2-0162 



„ +2HN0 3 . 200196 



Formic acid+HCl. F8990 



2 „ „ +H 2 S0 4 . 1-90186 



H 2 S0 4 +Oxalic acid. 1-93046 



Calculated 

 E.M.F. 



2-0150 

 1-9985 

 1-7901 



1-8200 

 1-8780 



E.M.F. 



Gain 



e of 



Per 



F. 



cent. 



•0012 



= -06 



•00346 



•17 



•109 



609 



•0818 



4-49 



•05246 



2-79 



The amounts of change of energy in these experiments are 

 are all very small, as in the experiments with Salts + Salts, 

 and the general conclusions to be drawn from the results are 

 largely similar to those in Section D. In the present 

 section, as in some others, the gains of energy are more 

 frequent and larger with a positive metal composed of mag- 

 nesium than with one of zinc. 



Section F. — Alkalies + Alkalies. 



Table XXI. — Positive metal, Aluminium. 



Strength of Solution 1 equivalent weight in grains in 1800 

 grains of water. 



Ingredients. E.M.F. 



KHO. 1-3814 



NaHO. 1-3914 



Mixture. 



E.M.F. 



KHO+NaHO. 1-3871 



Calculated 

 E.M.F. 



1-3855 



Change of 

 E.M.F. 



Per 



cent. 



Gain -0016 



Section G. — Halogens + Halogens. 



Table XXII. — Positive metal 7 Zinc. 



Strength of Solution 1 equivalent weight in grains in 511,500 

 grains of water. 



Ingredients. E.M.F. 



Mixtun 



E.M.F. 



CI. 

 Br. 

 I. 



1-9250 

 1-8706 

 1-4416 



Cl+Br. 

 Cl+I. 

 Br 4- 1 



1-8992 

 1-7133 

 1-69328 



Calculated Change of 

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



1-8873 

 1-5471 

 1-6074 



Per 



cent. 



Gain -0119 = 63 

 „ -1662 10-74 

 „ -0859 533 



