Hot water fire extinguishing fast or cold water extinguishing fast

Hot water fast! There are several reasons for this:

1.The same water absorbs heat when it is heated, but the specific heat capacity of water is much smaller than the heat of vaporization of water (2260 kJ kg), so hot water becomes gaseous and absorbs more heat, which is more conducive to lowering the temperature and can extinguish the fire faster.

2.When hot water is heated, it takes less time to turn into water vapor, and a large amount of water vapor can be lost in the air to isolate the air, so that the combustion can be suffocated!

With so many answers, I'm afraid you won't be able to choose! Hehe.

I think it's cold water. **Taiwan says that hot water is fast, which is not necessarily correct, and there are many errors in existing scientific research. Water on the five elements can overcome fire, water belongs to yin, and fire belongs to yang.

Hot water is yang water, which is closer to fire and is more easily assimilated by fire and burned out, so it has lost a cent of the original energy of water. It cannot fully embody the simple truth that water can overcome fire.

So in general, cold water in its natural state is more threatening and restrained to fire.

Hot water works well.

Hot water sprayed on the combustibles, not only can play a cooling role, and the burning materials are quickly surrounded by a cloud of steam, so that the surrounding oxygen is reduced, once the fire is hypoxic, the fire must be controlled, these vapor layers play a large area of suffocation, so that the fire from strong to weak finally achieve the effect of extinguishing the fire and eliminating the disaster.

Hot water is fast, and when hot water extinguishes a fire, a large amount of water vapor is immediately released to isolate the air, which should be faster than cooling down!!

There is no need to argue about this question, it is hot water!

When hot water extinguishes a fire, it carries water vapor, and water vapor can isolate the fire from the air!

Then, the hot water extinguishes the fire quickly!

Although I didn't explain this question very well, it was not very comprehensive!

But I've seen this problem in the **2 set of shows!

The answer is hot water!

Hot water extinguishes fires faster. Because hot water is more likely to form water vapor, which separates the fire from the air, the burning object will be extinguished due to the lack of oxygen.

Cold water is good, and hot water evaporates as long as a little heat is obtained, so hot water cannot be compared with the effect of cold water, and hot water is easier to react with some substances at high temperatures.

I think it's cold water, why does cold water have to be heated to extinguish the fire? Why do you have to absorb heat?

Spraying directly to the source of the fire, whether hot or cold water can easily solve the pull. Hehe. I'm blowing too.

Hot water, because the fire will not burn after it reaches the temperature of hot water, and of course cold water is the same thing.

Q Suck = Q Release.

cm△t1=cm△t2

The rate of endothermy is the same, calculate it yourself, which time is shorter.

Hot water! The principle is that "the amount of heat required for water to go from 0 degrees Celsius to 100 degrees Celsius is only 5 times the heat of water from 100 degrees Celsius to water vapor, and from the point of view of speed, water turns into water vapor at a faster rate", so with hot water, it takes less time for water to rise all the way to 100 degrees Celsius until it turns into water vapor!

There is no difference. Why do you always like to complicate things?

You go home and try it, boil a basin of hot water, then a basin of cold water, order a handful, try it and you'll know, just as fast!

If the burning is white phosphorus, of course, it is fast in cold water (if there is oxygen in the hot water, it is not good) I am asking, whether the cold water is distilled water, which contains less oxygen.

It is hot water, because cold water cools down a lot, and hot water cools down quickly.

Dizzy, the big brother on the 7th floor said it in such detail. Have you ever studied it in Bire? If you're not in junior high school, don't come here to this nonsense. The answer is hot water!

Cold water absorbs less heat when heated than hot water when it turns into steam.

Hot water is fast, hot water evaporates faster, and steam isolates oxygen.

Popular Science 2 Minutes: Is Hot Water Faster Than Cold Water? Scientifically proven, both are like this! It is inevitable that some accidents will happen in life, the fire is the order, the fire is the battlefield, Muzi Li Technology's popular science topic today: cold water and hot water to extinguish the fire, which is the fastest?

I have seen this question on TV once and the answer is hot water.

No way. Using cold water to extinguish a fire is to lower the temperature, so what can be done with hot water?

It depends on how big the fire is.

Which water is better at extinguishing fires compared to hot and cold water?

Which water is better at extinguishing fires in our daily lives than knowing hot and cold water? Let's talk about it today, if there is a fire, our consciousness will use cold water to extinguish the fire better, because cold water can quickly reduce the temperature of the fire. It is true that cold water is good for extinguishing fires, but for more effective extinguishing of fires, it is better to use hot water.

We all know that the important point is that hot water is sprayed on the combustibles, not only can play a cooling role, but also the burning materials are quickly surrounded by a cloud of steam, so that the surrounding oxygen is reduced, once the fire is hypoxic, the fire must be controlled, these vapor layers play a large area of suffocation, so that the fire from strong to weak finally achieve the effect of extinguishing the fire and eliminating the disaster.

Usually the fire cold water can achieve the purpose of reducing the ignition point, but the other two conditions cannot prevent it. The use of hot water to extinguish the fire, the hot water can quickly vaporize in a short time, produce water vapor, cover the fire source, so that the fire source can not get enough oxygen and cannot burn, so hot water can curb the development of the fire from two aspects. From a scientific point of view, hot water fire extinguishing seems to be faster, because the heat absorbed by converting hot water into water vapor is much greater than that absorbed by heating cold water to 100°C.

The extinguishing effect of boiling water is 5 times higher than that of hot water, and more than 10 times higher than that of cold water. In fire extinguishing practice, 1 liter of hot water per second plays the equivalent of 20 to 30 liters of cold water. If boiling water is used to extinguish the fire, 5 firefighters can complete the workload of dozens of firefighters, and the result is twice the result with half the effort.

In fact, there is no time to entangle whether to use cold water or hot water to extinguish the fire in the face of fire, although the cooling effect of hot water is worse than that of cold water, but the water vapor produced can achieve the effect of suffocating and extinguishing the fire. Coupled with the natural fire-extinguishing properties of water itself, the two-pronged approach makes the fire-extinguishing effect natural! Although hot water is effective in extinguishing fires, it is very difficult to get a large amount of hot water to extinguish fires in a critical moment.

Why firefighters don't use hot water to extinguish fires, hot water or cold water, is almost not so entangled, because in times of crisis, there is simply no time to think, as long as it is water, it is fine.

Our usual fire because of the hot water sprayed on the combustibles, not only can play a cooling role, but also can make the burning around the quickly be shrouded by a cloud of steam, so that the surrounding oxygen is reduced, once the fire is hypoxic, the fire must be controlled, these vapor layers play a large area of suffocation, so that the fire from strong to weak. When hot water is heated, it takes a shorter time to turn into water vapor, and a large amount of water vapor can be used in the air to isolate the air, so that the combustion can be suffocated and extinguished, and hot water can curb the development of fire from two aspects. From the above, you can get a general idea of what is going on.

The effect of cold water fire extinguishing is better, because the temperature of cold water is very low, and the effect of using cold water to extinguish the fire is very good, and the speed of extinguishing the fire is also very fast.

Of course, the fire extinguishing effect of cold water will be better, because the temperature of cold water is relatively low and the heat absorption capacity is stronger, so the fire extinguishing effect will be better.

Hot water, if you use hot water to extinguish a fire, it will be vaporized quickly in a short period of time, and a large amount of water vapor will be generated, and the fire extinguishing speed is very fast.

Hot water extinguishes the fire quickly. Hot water sprayed on the combustibles, not only can travel enough to play a cooling role, and the burning materials are quickly surrounded by a cloud of steam, so that the surrounding oxygen is reduced, once the fire is hypoxic, the fire must be controlled, these vapor layers play a large area of suffocation. <

Hot water extinguishes the fire quickly. Hot water sprayed on the combustion, not only can play a cooling role, but also the burning around the clump of steam is quickly enveloped, so that the oxygen around the stool is reduced, once the fire is deprived of oxygen, the fire grinding must be controlled, these vapor layers play a large area of suffocation.

Hot water extinguishes the fire quickly. Hot water sprayed on the combustion, not only can play a cooling role, but also the burning around the surrounding is quickly enveloped by a cloud of steam, so that the surrounding oxygen is reduced, once the fire is hypoxic, the fire must be controlled, these vapor layers play a large mold area suffocation.

How to extinguish a fire: 1. Isolate or remove the burning place or object from the surrounding combustibles, and the combustion will stop due to the lack of combustible substances.

2. Cover the object with asbestos blankets, wet sacks, yellow sand, fire extinguishers, etc., non-combustible or refractory materials, and close the first-class cabin.

3. The doors, windows, holes, etc. of the building and the top cover of the equipment container suffocate the combustion source, and spray the fire extinguishing agent directly on the combustion material to reduce the temperature of the combustible.

4. Spray the chemical fire extinguishing agent into the combustion zone to participate in the chemical reaction of combustion, so that the combustion leakage stops.

Whether the water used when extinguishing fires should be cold or hot has been a controversial topic. Some believe that the use of hot water is better for extinguishing the cortex because of its higher temperature and steaming capacity. Others, however, believe that using cold water is more appropriate because it cools the fire source more quickly, resulting in less fire.

What kind of water to use depends on the type and circumstances of the fire. In general, for most home and office fires, using cold water is a safer and more effective option. This is because cold water can quickly reduce the temperature of the stool at the source of the fire, slow down the fire, and control the fire.

In fact, however, for some types of fires, such as oil fires or chemical fires, the use of cold water can lead to larger fires. In these cases, hot water or other extinguishing agents may be more appropriate.

In addition, the safety and suitability of hot water or other extinguishing agents must be determined before using them. Improper use of these agents may cause ** or other safety concerns. Therefore, using cold water is the safest and most effective option for most people, but in some specific cases, it may be more appropriate to use other methods of extinguishing fires.

The choice of water to use to extinguish a fire depends on the type of fire, the situation, and the available extinguishing equipment. In any case, appropriate precautions must be taken, and the safety and suitability of the available options must be carefully evaluated before extinguishing the fire. In short,

Hot water or cold water, which is more effective for extinguishing fires?

a.Hot water! b.Cold water.

Correct Answer: a

Hot water extinguishes fires better than cold water. The reason is that hot water can not only reduce the temperature to below the ignition point of the fire, even boiling water 100 is far lower than the ignition point of almost all combustibles, and hot water can also quickly produce a large steam to envelop the combustible matter to "suffocate and isolate" the effect of disturbing the Kai, thereby reducing the surrounding oxygen content. If the oxygen content in the air is less than 17, combustion will stop immediately.