According to How Stuff Works, fire extinguishers use carbon dioxide to displace the oxygen necessary for a fire to burn, extinguishing the blaze. Fires need oxygen, fuel, and heat to ignite, and removing any one of those three components can put out a fire. Carbon dioxide extinguishers work because carbon dioxide molecules are heavier than oxygen …
CO2 is effective on liquid fires, gaseous fires and electrical fires (American classes B and C and International classes B, C and E). The gas is particularly useful for electrical fires as it’s non-conductive and leaves no trace after its use (as would be the case for foams or other gases). Advertisement.
Why Is Carbon Dioxide Used in Fire Extinguishers?
What Does Carbon Dioxide Fire Extinguisher Mean? A carbon dioxide (CO 2) fire extinguisher is a portable, active fire protection device that works by expelling carbon dioxide onto a fire.It works by displacing the oxygen the fire relies upon to continue burning, and it is primarily used to extinguish fires in which the source of the fuel is a flammable liquid or gas.
People Also Ask does carbon dioxide extinguish fires
How to use a carbon dioxide fire extinguisher?
How To Use A Carbon Dioxide Fire Extinguisher. Direct the CO2 at the base of the fire and move it gradually along the entire area of the flames. This type of fire extinguisher is also effective at tackling fires which involve live electrical equipment so are great for computer servers and similar.
How many deaths are caused by carbon dioxide fire extinguishers?
From 1975 to the present, a total of 51 carbon dioxide incident records were located that reported a total of 72 deaths and 145 injuries resulting from accidents involving the discharge of carbon dioxide fire extinguishing systems.
Is carbon dioxide a fire suppressant?
At the minimum design concentration (34 percent) for its use as a total flooding fire suppressant, carbon dioxide is lethal.
Why are fire extinguishers not suitable for chemical fires?
These extinguishers are not suitable for chemical or electrical fires since the liquid can conduct electricity and cause flammable agents to spread. Other extinguishers coat the fuel, forming a barrier between the flammable material and the oxygen in the surrounding air.
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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