THERMO-CHEMI STRY. 



77 



(100) HEAT EVOLVED IN CALORIES (GRAM-DEGREES) ON BURNING 

 1 G RAISE OF : 



Hydrogen to water at C 



to steam 



Wood-charcoal to carbon dioxide .... 

 ,, ,, to carbon monoxide . 



Graphite (natural) 



Gas-coke..., 



34462 



28780 



8080 



2400 



7797 



8047 



Coke 7100-6860 



Graphite from cast-iron 7762 



Diamond : 7770 



Wood (with 20 % water) 2750 



