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a) oxygen does not burn

b) oxygen combines with the fuel - it is NOT a catalyst.

c) a fire does acellerate when oxygen is added.

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16y ago
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8y ago

Fire is a chemical reaction between oxygen and a flammable substance. In this reaction the oxygen and the fuel are consumed to form new substances such as water vapor and carbon dioxide.

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Q: Why is oxygen used up when a fire burns?
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What is a reliable test to see if a gas is oxygen?

Set up a fire in the same box as the gas and see if the fire burns well. If it burns well, it is oxygen.


What are the three elements that make up fire?

fuel,oxygen,heat


What is the classic identification test for the gas Oxygen?

Just try lighting up a match, if it burns its a proof that oxygen is present...! But, do remember lighting up a match will start using the present oxygen, so if you think you'll have a limited amount of it available...be wise to put off the flame ASAP.


What stage of a fire does backdraft occur?

a backdraft occurs during a fire when intense heat is bottled up inside of a room and when oxygen is introduced via a door opening or a window breaking the fire flashes over.


How much oxygen does a fire need to burn?

The question is not straight forward, and the reason for that is that any material / compound / element that will burn in oxygen, will decay at a particular rate in a fire. So for example, highly combustible materials such as gasoline, or hydrogen, will combust rapidly in a relatively low percentage of oxygen. In the case of hydrogen, H2, the percentage of oxygen required to use up all the H2 present will be 50%, since the compound produced is H2O. If there is this much oxygen present, the result will be quite explosive. For a controlled fire or reaction, you would control the oxygen input, and / or the hydrogen input. Think of an engine in a car, only the fuel in the cylinder gets used / burned, not the entire gas tank!

Related questions

What is a reliable test to see if a gas is oxygen?

Set up a fire in the same box as the gas and see if the fire burns well. If it burns well, it is oxygen.


Does fire use up oxygen?

yes, it burns oxygen at a constant rate, that rate is unknown to me


What type of gas comes from the stove?

Well a fire normally needs Gas Air and Oxygen so it burns when you turn the gas on the fire will automatically shows up because you are completing the triangle to make fire which is GAS+AIR+OXYGEN=fire


What does fire do?

burns stuff up


Do fire extinguishers use oxygen?

No. Fire is a chemical reaction between oxygen and a flammable material. Adding extra oxygen speeds up the reaction, making the fire burn even hotter and making it easier for the fire to spread.


Why does coke act as reducing agent?

As it burns it uses up oxygen.


Why fire is burning up?

First of all the fire that you see is just the light emitted by a chemical reaction called oxidation. This reaction consumes energy, in the form of oxygen and a flammable material such as wood. If either one runs out the fire dies. So in short, fire requires a constant supply of energy and that runs out so fire 'burns up'.


What burns less than fire?

it's a candle from the wax it makes the fire heat up


How does fire affect air?

Part of air is made up of oxygen without which fire can't happen. Air can feed a fire; it contains oxygen.


When a match stick is burned what will happen?

Among other things:* You'll no longer have a match stick.* The wood of the match stick will convert to smoke; among other things, CO2 will be produced.* In the process, some oxygen will be used up.


Why fire is pointing up?

to reach the oxygen for fuel


Does a house burn up or down?

A house burns up (heat rises) but they say it burns down. A figure of speech.