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Why is it that when the air hole is closed the flame becomes yellow?
because the hole is closed, less oxygen is getting to the flame and therefore the flame cools down and is safe.
When evaporating dish is held over the flame ( air holes are closed )?
I assume the air holes are on a bunsen burner? In which case, when the air hole is closed the flame glows yellow, is less hot, and is more like the flame on a wax candle. When the air hole is opened, air is drawn in and the flame burns blue and produces a fiercer heat.
What are the two colors of a Bunsen burner flame?
The two colours are yellow - when the air-hole is open, and blue - when the air-hole is closed.
How do you control the type of Bunsen flame?
Decide which flame to use. If the air hole on the Bunsen is open you will get a roaring flame a more gentle heat, close the air hole a Little flame will be quiet.
Why should the air hole be open when you heat substances with the Bunsen burner?
If the air hole is closed, no air is getting to the flame. Fire must have oxygen in order to burn.
Why is it that when the air hole is closed the flame becomes yellow?
because the hole is closed, less oxygen is getting to the flame and therefore the flame cools down and is safe.
What happens to the temperature of the flame when the air hole is opened?
When the air hole is completely open, the flame is the hottest it can be. The fame turns blue. When the air hole is closed, the flame is yellow and its temperature is cooler.
When the air hole is half open what is the flame called?
Green flame cuz when the air hole is closed it is yellow and when it is open it is blue so when the colors are combined they make the green flame
What happens when the hole on a Bunsen burner is closed?
The "air-hole" of a bunsen burner allows some of the flame to escape so that the heating flame does not become too hot. A flame that is too hot can damage laboratory equipment. When the air hole is closed it is a yellow sooty flame like the fires we have at home.
When evaporating dish is held over the flame ( air holes are closed )?
I assume the air holes are on a bunsen burner? In which case, when the air hole is closed the flame glows yellow, is less hot, and is more like the flame on a wax candle. When the air hole is opened, air is drawn in and the flame burns blue and produces a fiercer heat.
What do you call a flame on a Bunsen burner when the air hole is half open?
air hole closed- flame is the standard yellow-orange color air hole half open- flame is a violet-blue color air hole open- roaring blue flame
What was the feature that allowed the Bunsen burner to get a hot flame?
Robert Bunsen added an air hole to it so it could have oxygen as well as gas. when the air hole is open the flame you get is blue and is hotter than when the air hole is closed, which then gives a yellow flame.
Why is a luminous flame formed when the air hole is closed?
The luminous flame is present when the air valve is closed because of an incomplete combustion process and the burning of trapped carbon (soot).
What are the two colors of a Bunsen burner flame?
The two colours are yellow - when the air-hole is open, and blue - when the air-hole is closed.
Why is it safer to close the air holes to obtain a luminous flame?
When the air hole on a Bunsen burner is closed, air is excluded, so the flame becomes a yellowish candle-like flame.
What is the name when the air hole is closed on a Bunsen burner?
It is a luminous yellow flame. 🔥
How do you control the type of Bunsen flame?
Decide which flame to use. If the air hole on the Bunsen is open you will get a roaring flame a more gentle heat, close the air hole a Little flame will be quiet.
