Heat of combustion of some common organic compounds.

Products of combustion, Co2 or So2 and water, which is assumed to be in a state of vapor.

Substance.

Therms per Gramme of Substance.

Substance.

Therms per Gramme of Substance.

Acetylene

11,923

Gas:

Alcohols:

Methane.....................

13,063

Amyl...............................

8,958

Napthalene................

9,618-9,793

Ethyl.....................

7,183

Gunpowder..................

720-750

Methyl....................

5,307

Oils:

Benzene.....................

9,977

Lard....................

9,200-9,400

Coals:

Olive.....................

9,328-9,442

Bituminous......................

7,400-8,500

Petroleum, American crude. .

11,094

Anthracite...........................

7,800

" " refined.

11,045

Lignite......................

6,900

" Russian..................

10,800

Coke......................

7,000

Woods:

Carbon disulphide.......................

3,244

Beech with 12.9 per cent. H2O

4,168

Dynamite, 75 per cent....................

1,290

Birch " 11.83" "

4,207

Gas:

Oak " 13.3 " "

3,990

Coal gas...........................................

5,800-11,000

Pine " 12.17" "

4,422

Illuminating...............................

5,200-5,500