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Full text of "The Flow Of Gases In Furnaces"

364

APPENDIX X

I;;

TABLE 6

HEAT RELEASED BY THE COMBUSTION OF THE PRINCIPAL COMBUSTIBLES AT
CONSTANT PRESSURE.    WATER ASSUMED TO REMAIN AS VAPOR


	
	
	
	
	B.t.u.
	
	

Substance
	Molec-
	
	
	
	
	
	Calories

Burned,
	ular
	Molec-
	Reaction of Combustion
	
	
	Per
	per

Unit Weight or Volume
	Formula
	Weight
	Formula
	Per Pound
	Per Cu.Ft
	Ounce Mole-
	Gram Molecule


	
	
	
	
	
	cule
	

Hydrogen. . .
	H2
	2
	H2 -f 0 . 5O2 = H2O
	52,384
	293.2
	6,548
	58.2

Carbon to CO
	C
	12
	C+0.502 = CO
	4,411
	148.1
	3,308
	29.4

Carbon .
	C
	12
	Q_i_Oo = CO
	14,640
	491.7
	10980
	97.6

Carbon mon-
	
	
	
	
	
	
	

oxide ......
	CO
	28
	CO + 0.5O2 = CO2
	4,366
	343.6
	7,673
	68.2

Methane ....
	CH4
	16
	CH4+202==CO+2H20
	21,961
	983.4
	21,961
	195.2

Acetylene. . . .
	C2H2
	26
	C2H2 + 2 . 5O2 = 2CO2 + H2O
	21,108
	1536.0
	34,300
	304.9

Ethylene ....
	C2H4
	28
	C2H4+3O2==2CO2+2H2O
	20,545
	1610.0
	35,955
	319.6

Ethane ......
	C2H6
	30
	C2H6 + 3 . 502 = 2CO2 + 3H2O
	20,392
	1812.5
	38,241
	339.9

Benzene (gas)
	C6H6
	78
	C6H6 + 7 . 5O2 = 6CO2 -f 3H2O
	17,308
	3779 . 2
	84,380
	750.2

Sulphur
	S
	32
	S 4- O2 = SO?
	3,893
	348.6
	7,785
	69.2

Sulphur .....
	S
	32
	S-f-1.5O2 = SO3
	5,164
	462.5
	10,328
	91.8

Evaporation
	
	
	
	
	
	
	

of water . . .
	H2O
	18
	
	1,073
	54 . 06
	1,207
	10.73


	
	
	
	
	
	
	

Low values are given for B.t.u. and calories released by different substances. Various
authorities differ on these values. The values given are from Les Sources de L'ttneryie
Calorifique, by Damour, Carnot and Rengade.