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How the flame produced when the air holes were closed. if the the flame was luminous what made it so?
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∙ 6y ago
When air holes are closed, oxygen supply decreases, leading to incomplete combustion and the production of soot particles. These soot particles can get heated up to incandescence and emit visible light, creating a luminous flame. The presence of carbon in the soot is what causes the flame to appear luminous.
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Why is it safer to close the air holes to obtain a luminous flame?
Closing the air holes limits the amount of oxygen available for combustion, which causes incomplete burning of the fuel and produces a sooty, luminous flame. This is typically less intense and therefore safer than an open, non-luminous flame.
In luminous flame the flame is produce when the air hole is open or close?
The luminous flame is produced when the air hole is partially closed, leading to incomplete combustion of the fuel. This results in the production of soot particles that glow and give the flame a yellow color.
What happen to the flame when the air holes are closed of the bunsen burners?
When the air holes of a Bunsen burner are closed, the flame will turn yellow and become sooty due to incomplete combustion. This is because the lack of oxygen restricts the amount of air reaching the flame, leading to inefficient burning of the fuel gas.
What is the outer cone of a Bunsen burner?
The outer cone of a Bunsen burner is the blue, luminous flame that surrounds the inner blue cone. It is where complete combustion of the gas occurs due to the influx of oxygen from the air holes at the base of the Bunsen burner. Adjusting the airflow controls the size and intensity of the outer cone.
What happens to the flame if the air holes are open too much?
If the air holes are open too much, it can lead to an influx of oxygen that may cause the flame to burn too hot and inefficiently. This can result in increased fuel consumption, uneven heating, and even potential safety hazards. Adjusting the air holes to the correct setting helps maintain a steady and controlled flame.
Why is it safer to close the air holes to obtain a luminous flame?
Closing the air holes limits the amount of oxygen available for combustion, which causes incomplete burning of the fuel and produces a sooty, luminous flame. This is typically less intense and therefore safer than an open, non-luminous flame.
In luminous flame the flame is produce when the air hole is open or close?
The luminous flame is produced when the air hole is partially closed, leading to incomplete combustion of the fuel. This results in the production of soot particles that glow and give the flame a yellow color.
What happen to the flame when the air holes are closed of the bunsen burners?
When the air holes of a Bunsen burner are closed, the flame will turn yellow and become sooty due to incomplete combustion. This is because the lack of oxygen restricts the amount of air reaching the flame, leading to inefficient burning of the fuel gas.
What flame is what you called when air holes are closed?
Safety flame
What make gas flame luminous?
A luminous gas flame appears yellow or orange due to incomplete combustion, which produces soot particles that emit light when heated. The mixture of fuel and air in the flame is not perfectly balanced, leading to an excess of fuel that results in the incomplete combustion process.
Bunsen burner blue flame?
The blue flame of a Bunsen burner is caused by complete combustion of the gas. It indicates that the gas is burning efficiently and at the hottest possible temperature. The blue flame is preferred for heating and sterilizing purposes in laboratories.
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]
When evaporating dish is held over the flame ( air holes are closed )?
If the evaporating dish is held over a flame with the airflow holes closed, pressure will build up inside the dish due to the expansion of air as it heats up. This can potentially lead to the dish cracking or even shattering due to the increased pressure. It is important to ensure proper ventilation when heating glassware to prevent accidents.
Why soot's is present in the flame if the air holes is closed?
Soot is present in the flame because when the air holes are closed, there is not enough oxygen for the fuel to burn completely. This incomplete combustion leads to the formation of carbon particles, which then combine to form soot.
What happened to the flame as you covered the air holes?
The flame will start to weaken and eventually go out as you cover the air holes. This is because the flame needs oxygen to sustain combustion, and by covering the air holes, you are restricting the flow of air needed for the flame to burn.
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 object in the night sky is not luminous?
Planets like Earth are not luminous and instead reflect light from the sun to appear visible in the night sky. These objects do not emit their own light like stars do.
