0
Why it is difficult to move the lid of a jar that is half filled with boiling water after the jar has cooled down?
when the jar has boiling water, the air above is hot and less dense therefore there is a lower amount of air molecules then out side the jar. When you put the lid on the hot air inside cools, the previously hot air condenses and creates a vacuum of lower pressure, making it harder to unscrew the lid
What else can I help you with?
What are the disadvantages of boiling water for drinking?
It is hot and must be cooled before consumption.
Can seeds germinate in cooled boiled water?
Seeds can germinate in cooled boiled water, so long as the water is no longer warm or hot. The act of boiling will actually clean the water, causing it to be sterile.
What is scalded and cooled mean?
In a recipe, this means to bring milk to the boiling point and then to return it to room temperature. "Scalded" can also mean "injured by boiling water".
Why a cup crack when it is filled with boiling water?
When a cup is filled with boiling water, the heat from the water caused the material of the cup to experience thermal expansion. If the cup is badly made, then different parts of it will expand to different extents and this will create stresses in the material of the cup causing it to crack.
What is Boiling seawater and recondensing the steam?
Boiling seawater and recondensing the steam is a process known as desalination. By boiling seawater, the water vaporizes, leaving the salt behind. The steam is then cooled and condensed back into liquid form, resulting in fresh water that is free from salt.
Why seeds can germinate by using tap water and seed cant germinate by using boiled water cooled to room temperature?
Tap water also contains some ammount of oxygen in dissolved form which is needed by the seed during germination for respiration. in boiled and cooled water oxygen is removed during boiling. Hence seed can germinate in tap water and not in boiled and cooled water.
Why are vegetables heavier after boiling?
Because water weighs more than air, so when boiled, the vegetable is filled with water
Why water is freshly boiled and cooled?
Freshly boiled and cooled water is often used to eliminate bacteria, viruses, and other pathogens present in the water, ensuring it is safe for consumption. Boiling also helps remove certain impurities and can enhance the water's taste by reducing chlorine levels. Cooling the water after boiling makes it more palatable and suitable for drinking or cooking without risking burns.
What can cause water vapor in the air to be cooled?
Water vapor in the air can be cooled by exposure to cooler air temperatures or by coming into contact with a colder surface. This cooling can lead to condensation of the water vapor into liquid water or ice, forming clouds or fog.
What is the difference about the behaviour of water when it is heated or cooled?
When water is heated, it absorbs energy and its temperature rises, eventually reaching its boiling point where it turns into steam. When water is cooled, it releases energy and its temperature drops, eventually reaching its freezing point where it turns into ice.
Did you see the demonstration of water in a closed flask boiling when cooled?
Yes. I saw it, and I was able to reproduce it in my kitchen. I didn't have a flask, so I used a glass bottle with a screw-on cap. After the water in the bottle was boiled, then removed from the heat and the bottle plunged into ice, the bottle, of course, soon disintegrated, but not before the water inside it had clearly and distinctly resumed its boiling.
How the boiling water and cooling of water vapor is a reversible reaction?
The process of boiling water and cooling the resulting water vapor is reversible because it can be easily reversed by either heating the cooled water or condensing the water vapor. When water is boiled, it turns into vapor due to the input of heat energy. Conversely, when the water vapor is cooled, it condenses back into liquid water by releasing heat energy.
