Ignition - Revision history

Jmdonev: 1 revision imported

2020-04-28T15:32:29Z

1 revision imported

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energy>Jmdonev at 17:24, 25 February 2020

2020-02-25T17:24:54Z

← Older revision		Revision as of 17:24, 25 February 2020
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	[[Category:Done ~~2015~~-08-21]]		[[Category:Done 2020-02-29]]
	[[File:Spark-plug01.jpeg\|300px\|thumb\|Figure 1. A gasoline-powered vehicle requires a spark plug to ignite its fuel.<ref>Wikimedia Commons [Online], Available: https://commons.wikimedia.org/wiki/File:Spark-plug01.jpeg#/media/File:Spark-plug01.jpeg</ref>]]		[[File:Spark-plug01.jpeg\|300px\|thumb\|Figure 1. A gasoline-powered vehicle requires a spark plug to ignite its fuel.<ref>Wikimedia Commons [Online], Available: https://commons.wikimedia.org/wiki/File:Spark-plug01.jpeg#/media/File:Spark-plug01.jpeg</ref>]]

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	Visit [http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Modeling_Reaction_Kinetics/Temperature_Dependence_of_Reaction_Rates/The_Arrhenius_Law/The_Arrhenius_Law%3A_Activation_Energies UC Davis ChemiWiki] for more information on ignition and activation energies.		Visit [http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Modeling_Reaction_Kinetics/Temperature_Dependence_of_Reaction_Rates/The_Arrhenius_Law/The_Arrhenius_Law%3A_Activation_Energies UC Davis ChemiWiki] for more information on ignition and activation energies.

	==~~See also~~==		==For Further Reading==
	*[[Combustion]]		*[[Combustion]]
	*[[Chemical chain reaction]]		*[[Chemical chain reaction]]
	*[[Thermodynamics]]		*[[Thermodynamics]]
	*[[Heat engine]]		*[[Heat engine]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}[[Category:Uploaded]]		{{reflist}}[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:31:53Z

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J.williams at 18:50, 24 August 2015

2015-08-24T18:50:44Z

New page

[[Category:Done 2015-08-21]]
[[File:Spark-plug01.jpeg|300px|thumb|Figure 1. A gasoline-powered vehicle requires a spark plug to ignite its fuel.<ref>Wikimedia Commons [Online], Available: https://commons.wikimedia.org/wiki/File:Spark-plug01.jpeg#/media/File:Spark-plug01.jpeg</ref>]]

<onlyinclude>'''Ignition''' is the process of providing the [[energy]] that is required to initiate a [[combustion]] process.</onlyinclude> When [[hydrocarbon]]s interact with [[molecular oxygen]] to combust, it requires what is known as [http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Modeling_Reaction_Kinetics/Temperature_Dependence_of_Reaction_Rates/The_Arrhenius_Law/The_Arrhenius_Law%3A_Activation_Energies activation energy] to do so - the minimum energy needed to "activate" a chemical reaction.<ref>UC Davis ChemWiki. (July 31, 2015). ''The Arrhenius Law: Activation Energies'' [Online], Available: http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Modeling_Reaction_Kinetics/Temperature_Dependence_of_Reaction_Rates/The_Arrhenius_Law/The_Arrhenius_Law%3A_Activation_Energies</ref>

An example of this would be if a pile of wood in the backyard: there is wood, and there is plenty of [[oxygen]] in the air, however there needs to be an initial intense bit of temperature to supply the energy to initiate the [[chemical chain reaction]]. In this case the energy originates in the [[friction]] of the match along the matchbox's striking surface, which ignites the chain reaction within the match, and can then be used to ignite the fire.

Ignition can be caused by a spark - this what a [[spark plug]] does in an [[internal combustion engine]] - which is somewhat intuitive to understand. Another way to ignite a chemical reaction is through compression - decreasing the volume of a closed container - which increases the [[temperature]] of [[molecule]]s within the container (by the [[ideal gas law]]) and provides the necessary activation energy. [[Diesel engine]]s rely on this technique for ignition.

Visit [http://chemwiki.ucdavis.edu/Physical_Chemistry/Kinetics/Modeling_Reaction_Kinetics/Temperature_Dependence_of_Reaction_Rates/The_Arrhenius_Law/The_Arrhenius_Law%3A_Activation_Energies UC Davis ChemiWiki] for more information on ignition and activation energies.

==See also==
*[[Combustion]]
*[[Chemical chain reaction]]
*[[Thermodynamics]]
*[[Heat engine]]

==References==
{{reflist}}[[Category:Uploaded]]