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Why a gauze is often placed over a burning flame for heating an object?
Wiki User
∙ 11y ago
To prevent flame impingement on the vessel being heated, which could damage the vessel. A flame cannot pass through a gauze (or screen). as a proof you could set up a bunsen burner beneath a wire gauze. Turn the gas on and ignite the gas above the gauze. you will notice the flame will stay above the gauze. If you ignite the flame beneath the gauze and lower the gauze into the flame, the flame will not pass above the gauze. Yet, if you light both below and above the gauze you will have flame on both sides. Indicating that flames impinging on the gauze do not burn the gas completely and the gas will pass through the gauze.
Wiki User
∙ 11y ago
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Why is a Bunsen burner not used for heating when the air hole is closed?
When the air hole is closed, the flame is a luminous flame. This flame is not ideal for heating for the following reasons: it is not as hot as the non-luminous flame it is very unstable it produces a lot of soot thus, only non-luminous flames (the blue one) is ideal for heating. :)
What happens to evaporating dish when placed to a non-luminous flame?
it doesnt change its color
It takes an initial spark or flame to light a candle what could be true regarding the burning of a candle?
The burning of a candle is spontaneous because it does not require continual input of energy.
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.
Can the the flame of closed air hole Bunsen burner can used for heating?
Yes,it can .But it might take longer time to heat
When heating a substance over a bunsen burner where should the object be placed for most efficient heating?
over a blue flame
What colour flame do you get when calcium chloride is burnt?
Red brick; it is not a burning but a heating.
What is the visible substance -given off by a burning object?
flame
What is appearance of a flame that is used for heating?
luminous
When did Burning Flame end?
Burning Flame ended on 1998-12-06.
When was Burning Flame created?
Burning Flame was created on 1998-10-12.
When was Burning Like a Flame created?
Burning Like a Flame was created in 1987.
What is considered an open fire?
An "open flame" refers to flame, usually used as a heating source, that is directly exposed to the outside elements, or often the object to be heated. Examples would include a Bunsen burner, a bonfire, or in some cases grills. The opposite would include heating elements that do not directly openly expose the flame, such as old stoves or heating elements.
On a Bunsen burner which flame is the 'clean' flame for heating?
Blue flame is a clean flame.
Which type of flame will you use for heating?
the blue flame
What is the duration of Burning Flame II?
The duration of Burning Flame II is 2700.0 seconds.
What is the duration of Burning Flame III?
The duration of Burning Flame III is 2700.0 seconds.
