| SI Units | English Units |
| Properties of some common fuels and hydrocarbons | |||||||||
| Fuel (phase) | Formula | Molar mass, kg/kmol | Density, kg/L | Enthalpy of vaporization, kJ/kg | Specific heat, Cp kJ/kg *K | Higher heating value, kJ/kg | Lower heating value, kJ/kg | ||
| Carbon(s) | C | 12.011 | 2 | 0.708 | 32,800 | 32,800 | |||
| Hydrogen(g) | H2 | 2.016 | 14.4 | 141,800 | 120,000 | ||||
| Carbon monoxide(g) | CO | 28.013 | 1.05 | 10,100 | 10,100 | ||||
| Methane(g) | CH4 | 16.043 | 509 | 2.2 | 55,530 | 50,050 | |||
| Methanol(l) | CH4O | 32.042 | 0.790 | 1168 | 2.53 | 22,660 | 19,920 | ||
| Acetylene(g) | C2H2 | 26.038 | 1.69 | 49,970 | 48,280 | ||||
| Ethane(g) | C2H6 | 30.070 | 172 | 1.75 | 51,900 | 47,520 | |||
| Ethanol(l) | C2H6O | 46.069 | 0.790 | 919 | 2.44 | 29,670 | 26,810 | ||
| Propane(l) | C3H8 | 44.097 | 0.500 | 420 | 2.77 | 50,330 | 46,340 | ||
| Butane(l) | C4H10 | 58.123 | 0.579 | 362 | 2.42 | 49,150 | 45,370 | ||
| 1-Pentene(l) | C5H10 | 70.134 | 0.641 | 363 | 2.20 | 47,760 | 44,630 | ||
| Isopentane(l) | C5H12 | 72.150 | 0.626 | 2.32 | 48,570 | 44,910 | |||
| Benzene(l) | C6H6 | 78.114 | 0.877 | 433 | 1.72 | 41,800 | 40,100 | ||
| Hexene(l) | C6H12 | 84.161 | 0.673 | 392 | 1.84 | 47,500 | 44,400 | ||
| Hexane(l) | C6H14 | 86.177 | 0.660 | 366 | 2.27 | 48,310 | 44,740 | ||
| Toluene(l) | C7H8 | 92.141 | 0.867 | 412 | 1.71 | 42,400 | 40,500 | ||
| Heptane(l) | C7H16 | 100.204 | 0.684 | 365 | 2.24 | 48,100 | 44,600 | ||
| Octane(l) | C8H18 | 114.231 | 0.703 | 363 | 2.23 | 47,890 | 44,430 | ||
| Decane(l) | C10H22 | 142.285 | 0.73 | 361 | 2.21 | 47,640 | 44,240 | ||
| Gasoline(l) | CnH1.87n | 100-110 | 0.72-0.78 | 350 | 2.4 | 47,300 | 44,000 | ||
| Light diesel(l) | CnH1.8n | 170 | 0.78-0.84 | 270 | 2.2 | 46,100 | 43,200 | ||
| Heavy diesel(l) | CnH1.7n | 200 | 0.82-0.88 | 230 | 1.9 | 45,500 | 42,800 | ||
| Natural gas(g) | CnH3.8nN0.1n | 18 | 2 | 50,000 | 45,000 | ||||