This is an incomplete question. You mean to say, "Is fire an exothermic reaction?". Even when the question is phrased this way, it still doesn't make sense. Fire is a product of a reaction, meaning energy (in form of heat) is produced. If fire is being produced, then the reaction that caused the release of heat is the exothermic reaction, not the fire.
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Yes, fire is exothermic. It releases heat and light energy as it burns by breaking down combustible materials like wood or gas, releasing stored energy in the form of heat and light.
Fire is an exergonic reaction because it breaks down matter. After the matter is broken down, energy is released.
Coal is an example of a fuel in the fire triangle, which consists of fuel, heat, and oxygen. Coal provides the material that can undergo combustion in the presence of heat and oxygen, completing the requirements for a fire to occur.
The combustion of gasoline is an example of an exothermic change because it releases heat and energy to the surroundings during the reaction.
Lightning is a result of an exothermic reaction, where energy is released in the form of light and heat. The rapid movement of electrons through the atmosphere creates the visible flash known as lightning.
The dilution of sulfuric acid is exothermic because it releases heat.
Striking a match is an exothermic process because it releases heat and light energy as the match ignites. The friction created when striking the matchstick generates enough heat to ignite the chemicals on the match head, leading to a chemical reaction that releases energy in the form of heat and light.