upper explosive limit


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upper explosive limit

[¦əp·ər ik′splō·siv ‚lim·ət]
(chemistry)
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Caption: FIGURE 6: Relation between the explosive range and the content of inert gas: (a) upper explosive limit; (b) lower explosive limit; (c) explosive limit.
Caption: FIGURE 7: Relation between the explosive range and the temperature: (a) upper explosive limit; (b) lower explosive limit; (c) explosive limit.
If combustible gases are present, the addition of oxygen may bring gases to a level between their lower and upper explosive limits. Also, increasing the oxygen level above 21 percent will increase the combustibility of many substances, causing them to burn violently.

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