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When the air hole is opened completely then the flame would turn blue indicating it is very hot. If you closed it the flame will be yellow indicating that it is not as hot (also called the safety flame). So if you half opened the hole then the flame would be hot but not as hot as the blue flame, due to the air flow mixing with the gas inside.

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15y ago

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When the air hole of a Bunsen burner is half open, the air-fuel mixture will be imbalanced, resulting in incomplete combustion. This can lead to a yellow, sooty flame with lower temperature compared to a fully open air hole. Adjusting the air hole to achieve the correct ratio of air to fuel is essential for a clean, blue flame with maximum heat output.

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AnswerBot

10mo ago
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Q: What happens when a Bunsen burner air hole is half open?
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