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Fire is a chemical reaction that converts a fuel and oxygen into carbon dioxide and water. It is an exothermic reaction, in other words, one that produces heat.
- What Is Fire Made of?
- Fire Without Oxygen
- State of Matter of Fire
- Why Fire Is Hot
- Cold Fire
- Sources
Fire is the result of a chemical reaction called combustion. At a certain point in the combustion reaction, called the ignition point, flames are produced. Ordinarily, flames consist primarily of carbon dioxide, water vapor, oxygen, and nitrogen. In the usual combustion reaction, a carbon-based fuel burns in air (oxygen). Potentially, fire only con...
Fire does not actually require oxygen. Yes, the oxidizer most often encounteredisoxygen, but other chemicals also work. For example, burning hydrogen with chlorine as an oxidizer also produces a flame. The product of the reaction is hydrogen chloride (HCl), so the fire consists of hydrogen, chlorine, HCl, light, and heat. Other combinations are hyd...
In a candle flame or small fire, most of the matter in a flame consists of hot gases. A very hot fire releases enough energy to ionize the gaseous atoms, forming the state of matter called plasma. Examples of fire that contains plasma include those produced by plasma torches and the thermite reaction. The main differences between gases and plasma a...
Fire emits heat and lightbecause the chemical reaction that produces flames is exothermic. In other words, combustion releases more energy than is needed to ignite or sustain it. For combustion to occur and flames to form, three things must be present: fuel, oxygen, and energy (usually in the form of heat). Once energy starts the reaction, it conti...
While all fire produces heator is exothermic, some fires are cooler than others. So-called cold fire refers to a fire that burns below a temperature of about 400 °C (752 °F). At this temperature, the flame of the fire is invisible, yet the reaction proceeds. While cold fire is fairly uncommon on Earth, scientists have produced it in space. In a mic...
Bowman, D. M. J. S.; et al. (2009). "Fire in the Earth system". Science. 324 (5926): 481–84. doi:10.1126/science.1163886Lackner, Maximilian; Winter, Franz; Agarwal, Avinash K., eds. (2010). Handbook of Combustion, 5 volume set. Wiley-VCH. ISBN 978-3-527-32449-1.Law, C.K. (2006). Combustion Physics. Cambridge, UK: Cambridge University Press. ISBN 9780521154215.Schmidt-Rohr, K. (2015). "Why Combustions Are Always Exothermic, Yielding About 418 kJ per Mole of O2". J. Chem. Educ. 92 (12): 2094–99. doi:10.1021/acs.jchemed.5b00333- Anne Marie Helmenstine, Ph.D.
Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. [2] Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different. [3]
Fire is the visible effect of the process of combustion – a special type of chemical reaction. It occurs between oxygen in the air and some sort of fuel. The products from the chemical reaction are completely different from the starting material.
The triangle illustrates the three elements a fire needs to ignite: heat, fuel, and an oxidizing agent (usually oxygen). [2] A fire naturally occurs when the elements are present and combined in the right mixture. [3] A fire can be prevented or extinguished by removing any one of the elements in the fire triangle.
A classic example is the flame generated by burning acetylene in oxygen, which reaches an eye-watering 3100˚C. The paltry 1500˚C flame produced by a wax candle, on the other hand, is too low to be considered a textbook plasma.
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Apr 2, 2015 · What is fire? Is it a wave or is it matter? Where does fire come from? Does everything burn with fire? (for example: water and some metals don't burn).
