The very large heat of vaporization of water is the reason why water is particularly suitable for extinguishing a fire. When water is poured onto the fire site, the water is not only heated, but also vaporized. As explained, the water requires a great deal of heat specifically for vaporization. This energy is supplied by the fire site.
Sand and water extinguish the fire because they both have high specific heat capacities. This means that they have the ability to absorb a lot of heat, which is what causes materials to catch on fire. Sand and water also have high thermal conductivity, meaning that they can transfer heat more easily than other materials.
Why And How Does Water Put Out Fire? Explained
The water molecule doesn’t become hot enough to separate into hydrogen and oxygen and instead, has two potential actions on the fire that can put it out. Firstly, it absorbs the heat from the fire. This is the main method by which water extinguishes fire. Room temperature water is about 77 degrees Fahrenheit and water won’t become steam until it hits 212 degrees …
Why does water kill fire? (The reasons for fire extinguishing by water) A lot of reactions, in general, require something called activation energy. It means that a certain amount of energy is required for the reaction to start to get a lot of reactions going. We often need to put in some initial energy to break some molecular bonds.
People Also Ask why can water extinguish fire
Why are exactly does water put out fire so effectively?
For a fire to start or keep on burning there are three main ingredients:A fuel that will oxidize, for to burn something is to oxidize a material;Oxygen to combine with that fuel into oxidation;The adequate temperature in the fuel/oxygen mixture so that the chain reaction keeps on. …A spark! Optional, not needed if temperature is high enough.
What are 4 ways to extinguish a fire?
A home in a small southern Manitoba community was engulfed in flames Saturday afternoon, forcing five neighbouring fire departments to lend a hand to put out the blaze. Carman firefighters say they were called to a home in Roseisle — a community 20 …
Why is sometimes dumping water on a fire counterproductive?
Water sinks in grease.Burning grease reaches temperatures over 400 deg F.Water boils at 212 deg F.If you throw water on a pot of hot burning grease, the water sinks for a moment into the grease, then rapidly turns to expanding steam.The expanding steam blows the grease into the air where it combines with oxygen.
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Why washing soda not used to extinguish fire?
Why are washing soda and sulphuric acid used in fire extinguishing machine? Soda acid type extinguisher acts by cutting off supply of air. … It increases the percentage of carbon dioxide in air (CO 2 is non supporter of combustion). This type of fire extinguisher contains a bottle of sulphuric acid supported by a metallic container filled …
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How does water put out fire? Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher