| Fuel Heats of Formation, Carbon Atoms, Hydrogen Atoms, Oxygen Atoms & Densities | |||||
| Fuel | Heat of Formation ( J / kmol ) | Carbon | Hydrogen | Oxygen | Density ( kg / m^3 ) |
| Ethanol | -277,690,000 |
2 |
6.0000 |
1 |
789.0 |
| Methanol | -238,666,000 |
1 |
4.0000 |
1 |
791.5 |
| Gasoline | -208,500,000 |
8 |
18.0000 |
0 |
702.5 |
| Propane | -122,876,000 |
3 |
8.0000 |
0 |
510.0 |
| Ethane | -99,320,000 |
2 |
6.0000 |
0 |
570.0 |
| Methane | -87,049,000 |
1 |
4.0000 |
0 |
422.4 |
| Kerosene | -24,149,000 |
1 |
1.9532 |
0 |
800.0 |
| Hydrogen | -8,123,000 |
0 |
2.0000 |
0 |
70.8 |
| Methylacetylene | 162,340,000 |
3 |
4.0000 |
0 |
700.0 |
| Quadricyclene | 302,080,000 |
7 |
8.0000 |
0 |
985.0 |
Fuel hydrogen is the number of hydrogen atoms in a fuel molecule. Hydrogen reacts with oxygen to produce water, releasing about 260,000,000.0 joules per kilomole. Hydrogen atoms have a molecular weight of one and one outer electron, while carbon atoms have a molecular weight of twelve and have four outer electrons. Since hydrogen has a lower molecular weight than carbon, fuels that have a higher proportion of hydrogen will generally be less dense than fuels which have a low proportion of hydrogen. Hydrogen has a molecular weight to oxidation ratio of one, while carbon has a molecular weight to oxidation ratio of three. Since hydrogen has a higher molecular weight to oxidation ratio than carbon, fuels that have a higher proportion of hydrogen will generally have a higher enthalpy change and therefore higher exhaust velocity than fuels which have a low proportion of hydrogen. Since water has a lower molecular weight than carbon dioxide, fuels that have a higher proportion of hydrogen will generally have a lower combustion temperature than fuels which have a high proportion of carbon. Fuel hydrogen is used to calculate fuel molecular, fuel oxidation and mixed water.
fuel molecular = 12 * fuel carbon + fuel hydrogen + 16 * fuel oxygen
fuel oxidation = 2 * fuel oxygen - 4 * fuel carbon - fuel hydrogen
mixed water = reacted fuel * fuel hydrogen + reacted oxidizer mix * oxidizer mix hydrogen
This is used in astropolis, bipropellant rocket, tripropellant rocket, pumped rocket and rocket cost.
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