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Depending on what you mean:
- If water is exposed to a vacuum (no air, not a cleaning mechanism) the water tries to evaporate. or turn to vapor. This sucks heat from the liquid and it cools off.
....any liquid has a specific boiling point. Dont confuse boiling with adding heat OK? So typically water at normal pressure boils at 212F. Well when we subject that water to a vacuum and lower the pressure, then it boils at a lower pressure and temperature. You can interchange the terms evaporate and boil here. Now the cooling part. In a lower pressure and during evaporation we see a change of stae from liquid to vapor; that is the important part as a very large quantity of energy is consumed during change of state. That energy comes from the surrounding water.
- If water is placed in a vacuum flask (a Thermos bottle) it stays cold (or hot) since heat cannot cross the vacuum in the walls of the bottle.
- If water is sucked into a vacuum cleaner the metal wand and hose will get cold as the air passin over the wet walls of the hos evaporates the water. The heat to do this is preferentially sucked from the walls of the machine.
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∙ 13y ago
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Can you use a vacuum breaker on a hot water heater to keep from emptying it when draining house pipes in winter?
Yes install it on the cold water line as close to the heater as possible.
How does vacuum flasks keep hot liquids hot and cold liquids cold?
by inhibiting heat conduction
What is the name of the thing used to keep liquids warm or cold?
Vacuum flask.
Why can cold water in an uncapped vacuum flask still stay cold?
It will certainly not stay cold as long as if it were capped.
How do you keep water warm for the longest time without using any heat source?
If the water is cold, you can keep it cold by storing it in a well insulated container, ideally a vacuum flask, or failing that, a Styrofoam chest. That doesn't keep it cold indefinitely, but it does keep it cold longer than if you did not use an insulated container. Also, even if you do not have electricity or ice boxes, you may still be able to buy a bag of ice. Many stores sell them.
What type of cups keep water cold?
Metalic cups keeps the water cold and it can be also used to keep the water hot .
How do you keep water cold?
Keep in the refrigerator or if u want it REALLY cold try freezing it
Why does water boil in a vacuum?
Clarification: I am wanting to know how much vacuum I need to pull to get water to boil at 150 degrees.
How do you keep turnips from turning brown?
there are some liquid selling in the market to keep the tender which sliced fruits and vegetable's to keep the fresh even several month's. peoples in home are used to keep the sliced fruits by put in the vinegar and leave it at the refrigerator.
How do you keep water cold the longest?
Ice..
Does Cold water keep ice cold?
The water would have to be colder than the ice to keep it cold. That is not possible unless it is brine(salt water). Then ice at 32f could be cooled by brine at say 30f.
How do you keep ice cubes cold with natural materials?
put them in cold water
