if you have a properly adjusted flame, which is pale blue, what is observed if the gas control valve is slightly closed

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08-09-2022
Chemistry

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if you have a properly adjusted flame, which is pale blue, what is observed if the gas control valve is slightly closed

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aryanagarwal466 aryanagarwal466 · Answer 1 · 2022-09-10T22:36:34-04:00

When there is less natural gas, a luminous flame will appear.

A luminous flame is one that produces more light from a fuel source with inefficient combustion. In other words, there is not enough oxygen available for stoichiometric combustion when combustion occurs. For more effective combustion, this emits light that is more in the yellow-orange range of the visible light spectrum as opposed to a more blue-nearly colorless region.

An acetylene torch is a good illustration of luminous falme because the first ignition is normally carried out in the presence of only acetylene, which produces a very sooty, bright, yellowish-red flame. The flame receives more of the necessary oxygen for effective combustion when the oxygen valve is opened, and the flame changes color to blue.

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