How long does it usually take to boil hot water? It only takes 5-10 minutes in low altitude areas, and only about 3 minutes in high altitude areas. In addition, when the water boils, open the lid, let the harmful substances in the water evaporate through the steam, and then boil for 2-3 minutes.
When the temperature just reached 100 ℃, the content of harmful substances such as halogenated hydrocarbons in the water exceeded the national standard; after boiling for 3 minutes, the content of harmful substances dropped rapidly to within the standard range. If water is continuously boiled, the halohydrocarbon content will decrease. However, other non-volatile substances in the water also increase, which can also cause harm to the human body. Therefore, the correct way to boil water is to turn off the high temperature immediately when boiling, and continue to heat it on a low heat. Boil for three minutes, then turn off the heat and take out fresh high-quality pure water.
How to quickly cool boiled water?
1. First, we need to prepare a pot, no matter what kind of pot, and then add water to it.
2. After adding a certain amount of water, pour 2 tablespoons of table salt into the water and stir to make the salt dissolve faster and fully dissolve in the water.
Then put the hot water you need to drink into the basin and let it sit for about three minutes.
4. After three minutes, the cup of hot water will become cold, why? The main reason is that the specific heat capacities of edible salt and water are different. The relative heat capacity of water is greater than that of brine. Therefore, the heat transfer effect is faster than that of water. Put this boiling water into salt water, the heat conduction effect will be better. If the boiling water is too hot and you want to drink it, try this method.
