Question

Почему вода гасит огонь

Answer 1

Вода перекрывает огню доступ кислорода и снижает температуру топлива, поэтому огонь гаснет.

Answer 2

Why does water extinguish fire?

Water is commonly used to extinguish fires because of its unique properties. When water comes into contact with fire, it cools down the temperature of the burning material, removes heat from the fire, and prevents the fire from spreading. Additionally, water can also smother the fire by creating a barrier between the fuel source and the oxygen in the air, effectively cutting off the fire's oxygen supply.

The process of water extinguishing fire involves several key factors:

1. Heat absorption: Water has a high heat capacity, meaning it can absorb a significant amount of heat before its temperature rises. When water is applied to a fire, it absorbs heat from the flames, reducing the temperature of the burning material and the surrounding area.

2. Vaporization: As water absorbs heat from the fire, it undergoes a phase change from liquid to vapor. This process, known as vaporization or evaporation, requires a large amount of heat energy. The heat energy is drawn away from the fire, further cooling it down.

3. Dilution: Water can dilute flammable substances, reducing their concentration and making it more difficult for the fire to sustain itself. By diluting the fuel source, water limits the availability of combustible materials, which helps to suppress the fire.

4. Smothering: Water can also smother the fire by creating a physical barrier between the fuel source and the oxygen in the air. Fire requires oxygen to burn, and by covering the burning material with water, the fire is deprived of the oxygen it needs to continue burning.

It's important to note that while water is effective in extinguishing many types of fires, it may not be suitable for all fire situations. For example, water should not be used on fires involving flammable liquids or electrical equipment, as it can spread the fire or pose an electrical hazard. In such cases, specialized fire extinguishers or suppression methods should be used.