It is not as easy to boil water as it seems. Moreover, the bubbles on the surface are not at all an indicator of its active approach to 100 degrees. Is it really better to boil cold water over hot water? And is it possible to bring the same liquid to a boil several times? Consider in the article the most popular myths about boiling water.
1. Alcohol evaporates during cooking
Many have heard that alcohol in food "does not count." In fact, this is not the case. Due to the fact that alcohol begins to boil at 78 degrees, the deceptive impression is created that it evaporates before the water reaches a boil. However, when diluted with other foods, alcoholic beverages behave differently from pure alcohol. If you simmer wine on a fire over 80 degrees, about 5% alcohol will still remain in the dish. In some cases, alcohol can be kept up to 49%. For example, if you decide to cook a dish in a narrow container, cover it with a lid and set it on a minimum flame.
2. Hot water takes longer to boil than cold water
No no and one more time no. The heating speed is influenced by the difference between the initial temperature and the environment (burner flame). Cold liquid first needs to "warm up", and only then it will start to boil. Hot water immediately goes to a boil. However, a cold liquid should be used for food and drink. It has less extraneous odors and dissolved salts.
3. Salt increases the boiling point
There is some truth in this, only it is not necessary to achieve such a result in the kitchen. In order for the water temperature to rise by at least a degree, you need to pour more than 100 g of a white product into it. Simply put, the dumplings will turn out to be incredibly salty. Bubbles on the surface and active bubbling are just a visual effect. Any container has scratches. They are the ones that cause the bubbles to appear. A similar illusion occurs in a glass of champagne. A thin bubbling stream is the result of a microscopic grain of sand and nothing more.
4. You cannot boil the same water
Another common myth, according to which heavy water is formed in a teapot, that is, deuterium is heavy hydrogen. Allegedly, the phenomenon occurs due to the passage of current through the liquid. In fact, to obtain 1 liter of heavy water, you will have to boil 2, 1 * 10 to the 30th degree of tons of water. This is 300 million times more than the mass of our planet.
We also advise you to read, Why do experienced carpenters soak nails in salt water before using.