What products are formed when alkanes are burned?

Let’s compose the equations:
1. СН4 + 2О2 = СО2 + 2Н2О – the reaction of methane combustion is accompanied by the release of carbon dioxide and water;
2. 2C2H6 + 4O2 = 4CO2 + 5H2O;
3.C3H8 + 5O2 = 3CO2 + 4H2O;
4.C4H8 + 6O2 = 4CO2 + 4H2O;
5.C5H12 + 8O2 = 5CO2 + 6H2O;
6.C6H12 + 9O2 = 5CO2 + 6H2O;
7.C7H16 + 11O2 = 7CO2 + 8H2O;
8.2C8H18 + 25O2 = 16CO2 + 18H2O
These reactions are exothermic, occurring with the release of heat. Methane, ethane, propane, butane in natural gas are used as gas fuels. In the composition of petroleum products: pentane, hexane, heptane, octane are used in motor fuel.