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Why is it safer to close the air holes to obtain a luminous flame?
Wiki User
∙ 7y ago
When the air hole on a Bunsen burner is closed, air is excluded, so the flame becomes a yellowish candle-like flame.
Wiki User
∙ 7y ago
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What happen to the flame when the air holes are closed of the bunsen burners?
It gains a yellow colour and becomes large and wavy hence luminous flame
In luminous flame the flame is produce when the air hole is open or close?
A bunsen burner (as used in a science lab or science classroom) will burn quietly, and a flickery yellow (like a wax candle) if the air hole is closed, or closed too much. If the air holes is opened, the flame will turn bluish and become noisy and hotter as more air mixes with the gas.
What happened to the flame when you slowly opened the air holes?
As more air enters the Bunsen Burner, the flame turns from a flickering (wax candle effect) yellow to a fierce sounding blue, much hotter, flame.
Will an object with holes bob up and down in the water or will it sink if it floated before you put holes in it?
It depends on the boyancy of the material and the location of the holes. A ship holed below the waterline will sink. A body board with holes in will float.
This is a spreading out of a wave around corners or through holes?
This is a spreading out of a wave around corners or through holes.
What make gas flame luminous?
There is a lack of oxygen in the flame itself (most probably because of the air holes in the Bunsen burner or of your burning device) this effect would create a luminous flame (better known as a yellow flame). A kind of flame that does not burn as hot as a non-luminous flame (better known as a blue flame)
What happen to the flame when the air holes are closed of the bunsen burners?
It gains a yellow colour and becomes large and wavy hence luminous flame
In luminous flame the flame is produce when the air hole is open or close?
A bunsen burner (as used in a science lab or science classroom) will burn quietly, and a flickery yellow (like a wax candle) if the air hole is closed, or closed too much. If the air holes is opened, the flame will turn bluish and become noisy and hotter as more air mixes with the gas.
What is turned to used to change the type of flame a Bunsen burner produces?
You would turn the collar on a Bunsen Burner so that the holes are exposing the flame to more oxygen to produce a blue flame. Close the holes by turning the collar to turn it back to the yellow (dirty) flame.
How does the number of carbon atoms affect the degree of luminosity of the flame produced?
luminous flame is the flame when you have not opened the air hole of your Bunsen burner. it moves around a lot. it looks a bit like the flame you find on candles. only it's a lot bigger. non-luminous flame is the flame when you have opened the air holes of your Bunsen burner. it's really steady, coloured blue only with no orange around it. sometimes though, you'll see small orange flames going up and disappears. ---------------------------------------------- Luminous: emitting light A luminous flame is created from an exothermic reaction (normally oxidisation) between that also emits visible light (EM radiation of wavelength 390[violet light]-750nm[red light]). A non-luminous flame is one that doesn't (EM radiation of wavelength<390nm but >750nm) Basically, if a reaction is making lots of heat (your normal, yellow Bunsen burner flame is at about 700^C) and you can see it, it's luminous. If you can't see it (and the heat is there) then it's non-luminous) [The yellow Bunsen burner flame is from the oxidisation of carbon molecules left over from the methane-oxygen reaction. The blue one is too, it's just happening faster so the wavelength decreases - ask your local physics teacher or put 100nm into Wikipedia search]
What colour is a Bunsen burner flame?
The most efficient flame that a Bunsen burner can produce should be pale light blue, and almost invisible. A yellow or luminous flame should be avoided as it isn't as hot as the blue flame and leaves sut.
What flame is what you called when air holes are closed?
Safety flame
What object in the night sky is not luminous?
the sun,an artificial satellite,an asteroid,black holes,white holes,worm holes
Why soot is present in the flame if the air holes is closed?
When you close the air holes, there will not be enough oxygen entering the burner to react with all the gas. As a result the methane cannot burn completely and carbon (soot) remains unburned.
What causes the luminousity of a flame?
Flame luminosity occurs because of lack of oxygen. Also, the air holes in the Bunsen burner affects the flame.
What the color of flame when opening air holes?
please answer this question
Bunsen burner blue flame?
The blue flame of the Bunsen burner is when it is hottest. The yellow flame is the safety flame. you should always start the burner on the safety flame which is produced when the holes on its base are closed.
