Kinetic Stability of Fuels

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At normal temperature, fuels are stable even in the presence of air. This is because, the activation energy of combustion reaction is high. When a mixture of fuel and air is burned, a flame has to be applied, that is the mixture has to be ignited. Near the flame, the contents are raised to high temperature and this provides the reactants with the necessary energy to react. Once the reaction begins, a lot of heat is liberated from the combustion, and this increases the temperature of the remaining fuel and the flame once produced is sustained.