The CO2 gas is heavier than the oxygen in the air so it effectively pushes it out, displacing it from around the fuel which is burning to cause the fire. The fire is extinguished because the oxygen it needs to feed the flames has been replaced by the carbon dioxide gas.
CO2 fire extinguishers are created by storing a mixture of liquid and carbon dioxide under pressure. When stored like this, the mixture remains a liquid form. When discharged, the mixture expands rapidly. It is propelled at high speed as a cold white jet onto the flame. The CO2 works to smother the fire, greatly reducing the oxygen from the source.
CO2 Fire Extinguisher: How it works and limitations
Carbon Dioxide fire extinguisher works by displacing oxygen from the fire triangle. The carbon dioxide is also very cold as it comes out of the extinguisher, so it cools the fuel as well. CO2 extinguisher may be ineffective at extinguishing Class A fires because they may not be able to displace enough oxygen to successfully put the fire out. Where you should not use the …
Watch how a fire can be put out by covering it in carbon dioxide gas.From the Peter Wothers lecture series – Fire and Flame
People Also Ask how does carbon dioxide extinguish a fire
Why is CO2 the best fire extinguisher?
Understand that recharging a fire extinguisher can cost between $10 and $25. …Only use a portable fire extinguisher on a small fire. …It’s recommended that you inspect your extinguisher annually, looking for cracks or corrosion. …Understand how the extinguisher must be maintained by reading the instructions. …
How dangerous is CO2 fire extinguisher pressure?
Unexpected venting of a cylinder through its safety can be startling to personnel potentially leading to accidents, property damaged, or personal injury. Coming into contact with the venting of the CO 2 charge of a cylinder can cause personal injury such as frostbite.
Why is C02 used for fire extinguishing?
Why is carbon dioxide used to put out fire? The fire uses oxygen and expels carbon dioxide. Carbon dioxide is denser than oxygen. So when you spray the carbon dioxide on fire, it sinks under the oxygen, separating the fire from oxygen.
How to put out a fire with carbon dioxide?
StepsSet a paper towel underneath the jar to catch any ingredients that spill over.Pour the vinegar into the jar until it is halfway full.Drop a spoonful of baking soda into the glass. …While the mixture bubbles and foams, light the candle with your matches or lighter.Put the container next to the flame. …Be amazed as the candle goes out!
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Extinguish Fire with Carbon Dioxide experiment Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher