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Why do not use water to set fire when extinguished?

Why do not use water to set fire when extinguished?

Wood caught fire, can use water to throw out the fire. That is common knowledge that everyone knows. But, if the pan of grease catches fire or the gas tank, the fuel tank catches fire, it is necessary not to pour water on it because then the water can not put out the fire but instead makes the fire bigger can put out the fire on wood, can’t put out the fire in the flat pan?

This is because combustion requires oxygen and certain temperatures. When burning wood, pouring water into the burning wood can completely isolate the wood’s contact with the air, which can lower the wood’s temperature. So the fire was immediately extinguished. When the fat pan catches fire because the density (density) of fat is smaller than water, if splashing water into the fat pan, the water immediately sinks under the grease layer, pushing the grease layer to the surface, just okay with no separation gas, does not work to reduce the temperature, so water does not extinguish the fire in the greased pan. If you do not skillfully, the fat can also flow out of the pan, spread outside, increase the fat’s contact area with the air, the bigger the fire.

fire fighter photo

So when the fat pan catches fire, what measures must be taken to extinguish it? The most direct method is to immediately cover the pan, making the fat and air isolate entirely; the fire will also turn off immediately.

If the gas tank catches fire, firefighters often use a fire extinguisher (containing fire extinguishing foam) to put out the fire. This is because this tank spews a large amount of carbon dioxide. Carbon dioxide is not both self-igniting, aiding fire, and heavier than air. It will quickly cover the fuel tank, making gasoline and air completely isolated, thereby promptly extinguishing the fire.


James Smith
I used to look up at the sky when I was a child and wonder what's in those stars. Growing up, when I had the opportunity to contact the source of human knowledge, I had more knowledge about the universe, the natural world, and created laws. Being the founder of Wikiwap is where I can share my understanding of the world around me in a simple way that readers can access knowledge like a child. You and I are parts of the world; life will always be beautiful.


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