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Answer:
1) A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work.
2)Kerosene, LPG, coal tar, naphtha, ethanol
4)Fuels are substances that react with oxygen to release useful energy. Most of the energy is released as heat, but light energy is also released.
In general, for complete combustion:
hydrocarbon + oxygen → carbon dioxide + water.
propane + oxygen → carbon dioxide + water.
5)Burning a fuel is called combustion.
6)The general equation for a complete combustion reaction is: Fuel + O2 → CO2 + H2O.
7)All combustion reactions are exothermic reactions.
8)Cellular respiration is similar to combustion because both reactions rely on fuel (reducing and oxidizing agents) to start the reaction; the difference is that in cellular respiration, enzymes are used during the reaction. Both result in smoke (CO2 and H20) and energy.
