Why does the airhole have to be closed when lighting a Bunsen burner?

Answer 1

Because if the air hole was wide open, the flame will be blue, which is going to be really hot so you have to leave it at a safety yellow flame which is when the air hole is closed when lit. It could be dangerous to leave a Bunsen burner on a blue flame.

this is confusing, explain more clearly, geez is dat too much to ask?

Answer 2

Closing the airhole ensures that the fuel-air mixture is optimal for combustion. By restricting the amount of air entering the burner, you create a more fuel-rich environment, making it easier to ignite the gas and produce a hot, efficient flame.

Answer 3

because when you close the airhole it turns onto a yellow falme(also known as safety flame) it must be on the yellow flame so you can see it , when you want to heat somethin over the Bunsen burner that's when you have it opened on the blue flame because the blue flame is the hottest flame.

Answer 4

To save burning yourself.

Allowing the air in, causes the Bunsen to burn with an intense, blue, hot flame. Lighting it in this way may cause burns.

With the hole shut, the flame is yellow and comparitively cool, you can even pass your hand through it, without being burned.

Answer 5

It Stops The Air Mixing With The Gas The Less Air Produces A Cooler Flame Its Safer

Answer 6

huh, oh yeah.... cos u will be caught on fire

Answer 7

Oxygen is mixed with fuel gas through the holes without oxygen combustion process does not occur.