Reboiling water. Why You Can't Boil Water Twice

Human life without water is impossible. With the help of water in the human body, 100% of metabolic processes occur. Also, with the help of water, a person maintains the purity of the body, things and home. The most useful is the so-called "living" water, which flows to the surface of the earth directly from natural sources, but its long-term boiling, especially 2-3 times in a row, can change its structure so much that it becomes unsuitable for drinking.

So why can't you boil water twice? It turns out that the point here is not in terrible medieval superstitions, but in the ordinary course of chemical processes. As many of you remember school course chemistry, in nature there are isotopes of hydrogen, which are also found in water molecules. If boiling water becomes a long process, then the heavier molecules settle to the bottom, while the lighter molecules turn into steam and escape. The same process occurs when water is boiled twice. Each subsequent boil makes the water heavier, which is harmful to the body.

There is another reason why you shouldn't boil water twice. In any water (the only exception is distilled) there is a certain amount of impurities. This is especially true for tap water that has gone through chlorination and other purification methods. As a result of boiling, water molecules (not all, of course) evaporate, and the concentration of impurities, thus, in the liquid increases.

All this answers the question why it is impossible to boil water twice. However, to take this so seriously that “I’d rather die, but I won’t drink boiled water twice” is still not worth it. In everything, the golden mean and balance are good.

So, if you recall back school textbooks in chemistry, then you can find tasks in them to determine the number of times water is boiled in order to increase the concentration of heavy water. The solution of such problems suggests that in order to achieve a more or less good result, water must be boiled 100 or more times. And hardly anyone will dare to boil water at home more than 100 times in a row. Therefore, you can boil water twice - it will not cause serious harm to the body.

However, people are different. And if one group of people is worried about whether it is possible to drink water that has been boiled twice, then members of another group, on the contrary, are worried about whether it is possible to drink water that has been boiled only once. In this regard, we want to reassure you: if you boil water to sterilize it, then you can safely drink water that you boiled once, because all the bacteria have already died during this process, and there is no need to perform the procedure a second time.

If you are not particularly worried about dangerous, dangerous bacteria, then you can not bring the water to a boiling point, but simply heat it to the desired temperature. By the way, in order for tea or coffee to be successfully brewed, you can simply heat the water to a “white” color - everything will brew well. At the same time, it is interesting that the water that is almost ready to boil acquires a “white” color as a result of the approach of saturated steam in its structure to the heated water, when an abundance of bubbles colors it in White color.

However, in fairness, it is worth noting that water boiled twice becomes less palatable. So, don’t be lazy, since we don’t have a shortage of water now, and you can safely pour the boiled water once into the sink and fill the kettle with fresh water from the tap.

Water is one of the most unique substances in nature. It is necessary for a person every day. An important factor in its use is purity and lack of harmful impurities. Poor water quality can be extremely dangerous for the body. Therefore, before use, it is usually filtered, frozen or boiled.

What happens to water when it boils?

Each of us boils water. Some use it as a drink, additionally cooling. Most make tea. Very often you can hear that water cannot be boiled twice. There is an opinion that such a liquid becomes dangerous to humans. This is explained by the fact that even with a long first heating, useful microelements disintegrate. In the second boiling, there is allegedly nothing useful left in the water at all.

Boiling is necessary in most cases. Tap water can harbor harmful bacteria. They die already after 2-3 minutes of heat treatment. But it is worth noting that some dangerous microorganisms are not afraid high temperatures. In this case, boiling is powerless to cope with the problem. Also, in this way, salts of heavy metals cannot be removed from the water.

It is believed that water should not be boiled twice due to the fact that it can become "heavy". From a chemistry point of view, this is a myth. Heavy water is almost impossible to create at home. This is a complex process. This result is affected only by long boiling over many years.

In addition, heavy water is not fatal to humans. It is relatively quickly excreted from the body.

The quality of boiled water may depend on the type of kettle. Many people do not boil water twice in plastic electric kettles. They believe that there is a reaction with the plastic. In fact, if the polymer is approved for use as a material in which water is heated, then it is safe.

Highly chlorinated water can be harmful to health. It already reacts with plastic during the first heating. Various hazardous substances begin to be released into the liquid. They can also be preserved by re-boiling. Therefore, the problem is rather not in the secondary boiling, but in the composition of the water. Before heating in electric kettle from plastic, it must be defended in a glass container.

The possibility of harm from secondary boiling can also be if the kettle is made of low-quality material, in which plasticizers are added. These substances make the plastic less brittle. They begin to stand out during heating. It turns out that we drink water or tea with a dose of plasticizers. Therefore, you should not buy cheap Chinese appliances. Cost is a direct indicator of the quality of plastic. Service life of kettles safe material- 3 years. After that, it is better to replace it with a new one.

Boiling water: myths and facts

1. Some attribute the harm of boiling to the fact that the structure of the liquid is disturbed. In order to deal with this, let us recall such a concept as the memory of water. It means that the liquid remembers the molecular composition of the substance initially dissolved in it. When heated, this memory is allegedly destroyed, and the water becomes dead. Official science does not recognize this fact. scientific name dead water- distilled. In fact, it is a liquid devoid of all impurities. It is obtained with the help of a complex technological process. Like heavy water, getting distilled water at home is almost impossible.
2. Another reason why re-boiling is feared is the loss of oxygen in the liquid during re-heating. It becomes less in the composition of the liquid already during the first heating.
3. Thus, when boiling, the quality of the water is important. Chlorinated water is dangerous, both at the first and at the second heating. When repeated heat treatment the liquid does not become hard. It's softer than regular tap water.
4. Boiled water will not cause harm to health under the following conditions:
5. Settling or filtration of liquid. Chlorine evaporates from the water and when heated, the formation of carcinogens will not occur
6. Proper utensils for boiling. Do not choose kettles made of cheap plastic. When water is heated in it, a plasticizer is released
7. Cleaning the kettle. This allows you to rid the water of impurities that accumulate on the walls of the dishes.

Everyone knows that drinking tap water is extremely harmful. But not everyone has the opportunity to buy bottled water or use special filters. Since time immemorial there has been one reliable way water disinfection - boiling. In the days of our mothers and grandmothers, many in the kitchen had a container with boiled water and children were ordered to drink only from it! Using the same water, some brewed tea or coffee, boiling it again in this way.

And today, many people often boil water several times, mainly for tea or coffee, being too lazy to pour out the liquid left in the kettle from the last time. This is especially true for offices, where one kettle is poured in the morning and water is boiled in it again every time someone wants to drink tea.

But will such a habit harm the body? Some supporters healthy lifestyle life argue that it is impossible to boil water again in any case. How right are they?

To begin with, we will tell you what impurities are contained in tap water. Firstly, this is a considerable amount of chlorine, which is used to clean it, but it can irritate the skin and mucous membranes, and in large doses contribute to the onset of cancer. Secondly, these are calcium and magnesium salts, which, when boiled, settle on the inner walls of the kettle - the well-known scale. Thirdly, heavy metals, such as lead, strontium and zinc, at high temperatures form carcinogenic compounds that provoke the occurrence of cancer cells. And fourthly - viruses, bacteria and similar microflora.

Water "living" and "dead"

What happens to all these substances during boiling water? Definitely, bacteria and viruses die at the first boil, so this is simply necessary to disinfect water. Especially if the water is taken from a dubious source - a river or a well.

salt heavy metals Unfortunately, they do not disappear from water, and when boiled, their concentration can only increase due to the fact that a certain volume of water evaporates. The greater the number of boilings, the higher the concentration of harmful salts. But, according to scientists, their number is still not enough to cause significant harm to the body at a time.

As for chlorine, during boiling it forms a lot of organochlorine compounds. And the longer the boiling process lasts, the more such compounds appear. These include carcinogens and dioxins that can have a negative effect on the cells of the human body. Scientists in the course of laboratory studies have found that such compounds appear even if the water was purified with inert gases before boiling. Of course, the harmful effect of such water will not be noticeable immediately, aggressive substances can accumulate in the body for quite some time. long time, and then lead to the development of serious diseases. To harm the body, you need to drink such water every day for several years.

According to the British Julie Harrison, who has extensive experience in researching the impact of lifestyle and nutrition on the occurrence of cancerous tumors, every time water is boiled, the content of nitrates, arsenic and sodium fluoride becomes higher. Nitrates are converted to carcinogenic nitrosamines, which in some cases cause leukemia, non-Hodgkin's lymphoma and other types of cancer. Arsenic can also cause cancer, heart disease, infertility, neurological problems and, of course, poisoning. Sodium fluoride adversely affects cardiovascular system, and in large doses can lead to sudden changes in blood pressure and dental fluorosis. Substances that are harmless in small quantities, such as calcium salts, become dangerous when water is repeatedly boiled: they affect the kidneys, contribute to the formation of stones in them, and also provoke arthrosis and arthritis. Especially not recommended repeatedly boiled water for children, because high content in it, sodium fluoride can seriously harm their mental and neurological development.

Another fact in favor of the inadmissibility of repeated boiling is the formation of deuterium in water - heavy hydrogen, the density of which also increases. Ordinary water turns into "dead", constant use which is at risk of death.

However, scientists are of the opinion that the concentration of deuterium in water, even after several heat treatments, is negligible. According to the studies of Academician I. V. Petryanov-Sokolov, to obtain one liter of water with a lethal concentration of deuterium, more than two tons of liquid from the tap will have to be boiled.

By the way, water boiled several times does not change its taste better side, so that tea or coffee made from it will not be what it should be!

To boil or not to boil?

Boiled water is still more beneficial for the body than water straight from the tap. So a single boil is quite reasonable. But it is better to refuse the repeated one, since organochlorine compounds are clearly released with it, even in small quantities, and this is fraught with the body later. It is much easier to acquire a new habit: before each tea party, fill the kettle with fresh water, giving it a little “breathe” beforehand - to weather chlorine and other harmful substances. And be sure to clean the kettle from scale!

Tries to take care of his body and maintain good health. Drinking is essential and vital important function. If a person can do without food for about five or seven days, then the lack of water will begin to negatively affect well-being after 24 hours. This article will tell you about the harm and benefits of boiled water. You will be able to find out which liquid is better to use and in what quantity. You will also draw conclusions about useful and harmful properties boiled water. It is worth studying in detail each factor that affects the state of drinking fluid.

Re-boiling water is most often done in the same container as before. The formed plaque on the walls of the kettle or pan heats up again and reacts with the collapsing liquid molecules. All this is not only not beneficial, but can also be very dangerous for humans.

How to protect yourself when drinking boiled water?

If you still prefer to drink a thermally processed liquid, then you need to do it correctly. Observe the following conditions:

• drink water immediately after it boils, do not wait until it has completely cooled down;
• after processing, pour the contents of the kettle into a separate container (preferably glass);
• never store water in the same vessel in which it was boiled;
• regularly wash the kettle from scale and plaque;
• do not drink the liquid after 2-3 hours after boiling, but rather prepare a new portion;
• periodically consume raw purified liquid.

Summing up and conclusion

So, now you know what boiled water is (the benefits and harms of the product are described above). Having concluded, we can say that the raw liquid is less dangerous than the thermally processed one. So what kind of water should you drink? Processed or not?

It all depends on the region in which you live and the condition of the tap fluid. Find out what kind of boiled water you have. The benefits and harms of this product can be tested in a special laboratory. AT recent times Purifying filters have become very popular. They rid the liquid of harmful compounds and fill useful properties. Drink only good water and always stay healthy!

Why can't you boil water a second time? - Unfortunately, many do not know the answer to this question, and every day they make a mistake, not draining old water from a teapot. But this ban has been known for a long time, but most simply turn a blind eye to it in order to save water and pay for utilities. In this article, you will find comprehensive information on why it is harmful to boil water several times.

Why boil water?

As you know, no living creature can live without water, be it a plant, an animal, a microorganism or a person. 80% of our body consists of liquid (in infants - 90%). Fresh water is simply necessary for us for normal metabolism and removal of toxins and slags from the body.

Unfortunately, the problem of clean tasty water in modern world more than relevant:

• in villages where one could find clean springs before, now they are no longer completely clean due to soil pollution;
• in the city water, to reach the apartment, you need to go through kilometers of pipes of dubious purity.

Important! Naturally, in the latter case, the liquid is disinfected with special substances, for example, using bleach, but this spoils the taste and smell of water, and it does not help much. Regarding cleaning systems, their effectiveness is very controversial, because in some cities they have not changed for several decades.

Conclusion regarding quality drinking water deplorable. In order to at least somehow correct the situation, people began to boil the liquid. The purpose of this process is one - to kill all bacteria and microbes that are in raw water that is, literally sterilize her.

Indeed, most microorganisms die under the influence of high temperatures. Then why shouldn’t water be boiled many times, because doctors recommend using only the liquid that was boiled once to make tea or coffee, be sure to pour out the old residues. To deal with this recommendation, consider the physical and Chemical properties ordinary water.

What happens to water during boiling?

Let us consider in detail what changes occur at the moment the temperature reaches 100 degrees Celsius with the composition of H2O:

• During the boiling process, oxygen and water molecules evaporate.
• Since all water contains a large number of impurities, you should know that after boiling they do not go anywhere. Moreover, their concentration increases, as the liquid itself becomes smaller due to the evaporation of water molecules. Particles of dirt and salt settle on the bottom of the kettle, forming a white scale.

Important! That's why sea ​​water even after boiling it is unsuitable for drinking.

• All pathogenic bacteria, viruses and microbes are destroyed.

Important! It is a mistake to think that each subsequent boil kills everything. large quantity harmful microbes, viruses and bacteria. All harmful microorganisms die at the first heat treatment at 100 degrees Celsius.

• Water molecules contain heavy chemical elements are isotopes of hydrogen. They are resistant to temperatures up to 100 degrees and settle to the bottom during the boiling process. Thus, the liquid becomes more "heavy".

Can you boil water multiple times?

A large number of people do not drain the old, previously boiled liquid, and boil it again to make themselves tea. Is it bad to boil water a second time? - Let's look into this matter.

Boiled water is completely tasteless

If a fresh transparent liquid does not already have a special taste, then boiled one loses even its remnants. And if you boil water several times, then it turns into a very tasteless one. To understand the difference, you can conduct an experiment:

Boiling makes water "dead"

The more often and more water is processed, the more useless the resulting liquid is. When boiling, the chemical formula of H2O is violated, as oxygen leaves the liquid. The water becomes dead.

The amount of impurities increases

With each subsequent boiling of the same liquid, the concentration of salts increases. Naturally, human body does not immediately feel such changes, and the toxicity of such a liquid is a negligible percentage. But all reactions in “heavy” water are slower, and deuterium, an element that is released from hydrogen during boiling, tends to accumulate, which brings undoubted harm to the body.

Important! "Heavy" water looks the same as ordinary water, and chemical formula has the same - H2O, but instead of light hydrogen atoms (protium) it contains heavy hydrogen atoms (deuterium).

Dogs, rats, mice and other mammals die after about a week of regular consumption of such water due to the replacement of more than 25% of light hydrogen in tissues by heavy hydrogen. A person without harm to health can theoretically drink two glasses of "heavy water". In this case, after a few days, the deuterium will be completely eliminated from the body.

Carcinogens are formed

As a rule, the water that we boil for our food needs is treated with bleach. In the process of heating to 100 degrees Celsius, chlorine enters into chemical reaction With organic matter resulting in the formation of carcinogens. This is another one of the significant reasons why water should not be boiled repeatedly. With each subsequent heat treatment, the concentration of carcinogens increases, and these substances are known to provoke the development of cancer in the human body.

How to boil water correctly?

Boiled liquid is already of little use, but its repeated processing makes it harmful. Therefore, before the next procedure for heating water for tea, follow these simple rules:

1. Use fresh water each time you boil.
2. Is it possible to boil water a second time? You can, but you definitely don't need to! Do not boil again, as well as add fresh liquid to the treated residues.
3. It is advisable to let the water stand for several hours before boiling.
4. When using a thermos, do not close it with a cork immediately after pouring boiling water into it. Do it in a few minutes.
5. Keep an eye on the container in which you boil water. Immediately descale the kettle - for this you can use citric acid or vinegar.
6. No need to think long about how much water to boil. Wait for the water to turn white from saturating it with air bubbles and turn it off. Don't wait until it starts bubbling and splashing. Remember that the longer the water boils, the less it becomes and the higher the concentration of carcinogens. That's why you can't boil water for a long time.

Important! Boiling for more than 20 minutes completely changes the structure of the water.