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I have read it some where that the inside pressure of Co2 in fire extinguisher is 55 to 58 kg/cm2 at 21 deg C. However the pressure varies as per the ambient temperature.

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Why is carbon doixide a liqiud at room temperature when it is in a fire extunisher?

Carbon dioxide is a liquid in a fire extinguisher because it is kept under high pressure inside the extinguisher. This high pressure compresses the gas molecules together, causing them to condense into a liquid form at room temperature. When the fire extinguisher is activated, the liquid carbon dioxide is released as a gas, which helps smother the fire by displacing oxygen around it.


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What happens to the particles in carbon dioxide gas when compressed in a fire extinguisher?

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What is a CO cartridge and how does it work?

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