Should the air hole be open or closed when lighting the Bunsen burner?

A lighted Bunsen Burner with its air holes closed giving a yellow safety flame. You must never use the yellow safety flame to heat something. Before you can heat something you must open the air-holes by turning the metal collar. The more the air holes are open, the more fierce the Bunsen flame.

What is the proper way to light a Bunsen burner?

STEPS TO LIGHT BUNSEN BURNER:

1. Check connections to burner and desk outlet valve.
2. Close needle valve and collar.
3. Open desk outlet valve fully.
4. Open needle valve 1/2 turn.
5. Use the spark lighter to light the flame.
6. Adjust collar and needle valve till you see a blue flame.

What is the air hole on a Bunsen burner?

The other critical component of a Bunsen burner is the air hole. This is located near the bottom of the chimney, just above the gas inlet. The air hole allows pre-mixing of air and gas before combustion occurs at the top of the chimney.

What is the color of the flame when the air inlet holes are closed?

yellow
The flame when the air-hole is open is blue, luminous, and clean. When the air-hole is closed, however, there is less oxygen available. This results in incomplete combustion of the gas. The color of the flame changes to yellow and the flame is wavy.

When the air hole is closed?

Closed Air Hole When the air hole is closed the natural gas can only mix with air at the mouth of the chimney. There is therefore not enough oxygen for complete combustion and incomplete combustion occurs.

What Colour is the flame on a Bunsen burner when the air hole is half open?

blue flame
air hole half-open, 4. air hole fully open (roaring blue flame).

What is the blue flame on a Bunsen burner called?

The next type of flame is characterised by a bright blue triangle in the centre of the flame and can reach temperatures of around 700oC. This flame makes a noise and is commonly known as the roaring blue flame. 1) Why is the yellow flame known as the safety flame?

When the air hole of a Bunsen burner is closed the flame is?

When the air-hole is closed, however, there is less oxygen available. This results in incomplete combustion of the gas. The color of the flame changes to yellow and the flame is wavy. The yellow color is produced from particles of carbon (soot) in the flame which results from incomplete combustion of the methane gas.

How do you light a bunsen burner?

When lighting a Bunsen burner, start with the air holes mostly closed. The flame will be yellow and not very stable. It will waver with and air movement like a candle. Slowly open the air holes until the flame turns blue. It should be more stable since the flow of gas and air mixed will be faster.

Why do you close the air hole on a bunsen burner?

When you close the air hole it deprives the flame of oxygen and lessens the heat. This makes the flame safe to put your hand in. When you walk away from the Bunsen burner it should be left like this because if someone accidentally puts their hand in the flame, they will be less likely to get burnt.

What does it mean when a gas burner flame turns yellow?

A yellow burner flame is a symptom that the burner is not getting enough air for complete combustion of the gas. Correcting this problem involves adjusting the burner’s air shutter to admit more air, something that an experienced do-it-yourselfer can do.

What does a blue flame mean on a gas stove?

A blue flame indicates safe and efficient combustion, meaning that the gas is being burned efficiently and not being wasted. Blue flames are hotter and indicate more complete combustion. Whether it is your gas stove, gas furnace, or any other gas appliance, you always want a blue flame. Is a blue flame dangerous?