How can we boil water without heating it?

AI Thread Summary
Boiling water without heating it can be achieved by manipulating pressure and creating a vacuum. When a liquid is boiled, it transitions from liquid to vapor at its boiling point, which is influenced by atmospheric pressure. A demonstration involving a flask showed that by removing air and then applying an ice cube, water can boil at lower temperatures. This illustrates that reducing pressure can lower the boiling point of water. Overall, understanding the relationship between pressure and boiling is key to this phenomenon.
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How can we boil water without heating it?
 
Science news on Phys.org
What is boiling? What does it mean when one says a liquid is "boiling"?
 
Pull a vacuum?
 
I remember a "Mr. Wizard" where they boiled water with an ice cube. First they boiled the water in a flask to get all of the air out and leave only water vapor. Then they corked the flask and took it off the flame. It stopped boiling. Then they rubbed it with an ice cube on the top of the flask and it quickly started boiling again.
 
Pressure play a part in determine the boiling pt of liquid.
Create a vacuum with water inside it, u will see the water boil.
 
Thread 'Thermo Hydrodynamic Effect'

Thread 'Thermo Hydrodynamic Effect'

Vídeo: The footage was filmed in real time. The rotor takes advantage of the thermal agitation of the water. The agitation is uniform, so the resultant is zero. When the aluminum cylinders containing frozen water are immersed in the water, about 30% of their surface is in contact with the water, and the rest is thermally insulated by styrofoam. This creates an imbalance in the agitation: the cold side of the water "shrinks," so that the hot side pushes the cylinders toward the cold...
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