Tables 295 and 296 

 TABLE 295. — Heats of Combustion of Some Carbon Compounds 



3°7 



Given in kg.cal.15 at constant pressure per gram-molecular weight in vacuo. When referred 

 to constant volume the values should be 0.58 kg.cal.15 smaller (at about i8°C) for each 

 condensed gaseous molecule. Combustion products are C0 2 , liquid H 2 C), etc. Benzoic acid 

 was adopted at Lyons as a primary standard, its heat of combustion, 6324 g.cal isper gram 

 in air, 6319 in vacuo. This is tacitly assumed as heat of isothermal combustion at 20°C. 

 In absolute joules, 26,466 and 26,445 respectively. The following ratios may be taken as 

 standard: Naphthalene/benzoic acid = 1.5201 (air); benzoic acid/sucrose = 1.6028 (air); 

 napthalene/sucrose = 2.4364 (air). The following values are from Kharasch, Bur. Stand- 

 ards, Journ. Res., 2, 359, 1929, which see for further values. 



Compound 



For- 

 mula 



Compound 



For- 

 mula 



Mole- 

 cular 

 weight 



Kg. cal.15 



per 



g.mol. 



Methane (g) 



Ethane (g) 



Propane (g) 



Isobutane (g) 



n-Hexane 



n-Heptane 



n-Octane 



Decane 



Hexadecane (s) 



Eicosane (s) 



Ethylene (g) 



Propylene (g) 



Isobutylene (g) 



Amylene 



Hexylene 



Acetylene (g) 



Allylene (g) 



Trimethylene (g) . . . . 



Benzene 



(v) 



Toluene 



Napthalene (s) 



Methyl-chloride (g) . 

 Methylene- " (v) . 



Chloroform (1) 



(v) 



Carbon-tetrachloride 



(1) 



Carbon-tetrachlo ride 



(v) 



Carbon di-sulphide (1) 

 " - (v). 



Methyl alcohol 



Ethvl " 



Allyl " 



CH 4 

 C 2 H 6 

 CsHs 

 OH 10 



C 6 Hi4 

 C7H16 

 CaHig 

 C10H22 

 C16H34 

 C20H42 



C2H4 



GiHe 

 C 4 H 8 

 C5H10 

 CeHn 

 C2H2 

 C3H4 

 C 3 H 6 

 CeHe 



C 7 H 8 



Ci„H 8 



CH3CI 



CH2CI2 



CHCb 



CCU 



CS2 



CH4O 

 C 2 H 6 

 CsHeO 



Formaldehyde (g) . . . . 



Acetone (v) 



Camphor (s) 



Sucrose, cane (s) 



" milk (s), 



anhd 



malt (s) 



Starch 



Glycogen 



Cellulose 



Formic acid 



Acetic " 



Propionic acid 



n-butyric " 



n-valeric " 



Palmitic " (s) . . . . 

 Stearic " (s) . . . . 



Lactic • " (s) . . . . 



Aniline 



Urea (s) 



Nicotine 



Cyanogen (g) 



Trinitrotoluene (s) . . . 



n-propyl " 



n-butyl " 



n-heptyl " 



Octyl " 



Cetyl " (s) . . . 



Menthol (s) 



Phenol (s) 



Thymol 



Dimethyl ether (g) 

 Methvlethyl " (v) 

 Diethyl " (v) 



CH2O 

 CsHeO 

 CioHieO 

 C12H22O1 



CH2O2 



C2H40-2 



C3H6O2 



ClKo. 



C5H10O2 



C16H32O2 



C18H36O2 



CsHeOs 



GsHtN 



CH4N2O 



C10H14N2 



C2N2 



C-H5N3O 



CsHsO 



C4H10O 



C7H16O 



CsHisO 



CieHsjO 



C10H20O 



CeHeO 



CioHhO 



C 2 H 6 



CsHsO 



C4H10O 



30.02 



58 



152.13 

 342.18 



46.02 



60.03 



74-05 



88.06 



102.08 



256.26 



284.29 



90.05 



93.07 



60.05 



162.13 



52.0 



J -'7.'/ 1 



60.06 



74-08 



116.13 



130.14 



242.27 



156.16 



94-05 



150.11 



46 



60 



74-08 



I34-I 

 435-8 



141 1 



1349-6 



1350.8 



1351 



4178.8 



4186.8 



4180.8 



62.8 



208.2 



367.2 



524.3 



681.6 



2391 



2700 



326.0 



813.7 



151-6 



1427.7 



260.0 



826 



482.0 



639.4 



1104.9 



1262 



2504.5 



1508.8 



732.2 



1353.4 



347-6 



503.4 



660.3 



TABLE 296. — Heats of Combustion of Miscellaneous Compounds 



Substance. 



Asphalt 



Butter 



Carbon: amorphous. 



charcoal 



diamond . . . 

 graphite 



Copper (to CuO) 



Dynamite, 75% 



Egg, white of 



Egg, yolk of 



Fats, animal 



Hemoglobin 



Hydrogen 



Iron (to Fe203) 



Magnesium (to MgO) 



Oils: cotton-seed. . . . 



lard 



olive 



Small 



calories 



per g 



substance 



953o 

 9200 

 8080 

 8100 

 7860 

 7900 

 S90 

 1290 

 57oo 

 8100 

 9S°o 

 5900 

 33900 

 1582 

 6080 

 9500 

 9300 

 9400 



Substance. 



Oils: petroleum: 



crude 



light 



heavy 



rape 



sperm 



Paraffin (to CO2, H2O 1) . 

 Paraffin (to CO2, H2O g). 



Pitch 



Sulphur, rhombic 



Sulphur, monoclinic 



Tallow. . .' 



Woods: beech, 13% H2O 

 birch, 12% H2O. 

 oak, 13% H2O.. 

 pine, 12% H2O. 



Small 



calories 



perg 



substance. 



1 1 500 

 1 0000 

 10200 

 95oo 

 1 0000 

 1 1 140 

 10340 

 8400 

 2200 

 2240 

 9500 

 4170 

 4210 

 3990 

 4420 



References: (1) Slossen, Colburn; (2) Mean; (3) Berthellot; (4) Roux, Sarran; (5) Thomsen; (6) Stoh- 

 inn; (7) Gibson; (8) Gottlieb. 



Smithsonian Tables 



