Boiling Water Without Heat Using Vapor Pressure Experiment

An eye opening video that shows that water doesn't need to be heated (or even hot) to boil? Sure... we know from science class that water boils at 212 degrees Fahrenheit at sea-level but what about under a vacuum? Watch this.

The venturi siphon pump I used can be purchased here:

Nalgene* Aspirator Vacuum Pump 09-960-2 from Fisher Scientific.

Nalgene Vacuum Pump Polypro
S41381
Vendor No.:6140-0010EMD

see: https://www.fishersci.com/wps/portal/PRODUCTDETAIL?productId=694608&catal...


Another video to watch, but remember the speaker is talking about Celcius and not Farenheit degrees. http://www.youtube.com/watch?v=9q5gEZGoBnk

Category:

Education

Tags:

• boiling
• water
• vacuum
• vapor
• pressure
• experiment
• venturi
• siphon
• pump

[jaca197535]

<hello. I liked very much your experiment. I would like to ask you if the valve is a normal T valve or it is a special valve. Thank you

[inventorr77]

@jaca197535 The venturi siphon pump I used can be purchased here:

Nalgene* Aspirator Vacuum Pump 09-960-2 from Fisher Scientific.

Nalgene Vacuum Pump Polypro

S41381

Vendor No.:6140-0010EMD

Click "more" in my description of the video to see the link to Fisher Scientific.

[inventorr77]

The meaning of the term "boil" is explained in context here at wikipedia

see: Atmospheric_pressure_boiling_p­oint

[ChamplooSundae]

So, theoretically say your stranded in the Ocean in a raft, you have the basic set up; A jar, the tubes, nipples, and siphon thingy, would you be able to create the suction siphoning the sea water through a tube in-place of your sink.

[inventorr77]

I'm not quite sure I understand your question. What would create the force required to push the seawater through the tube?

[FLIPWILSON1]

Way to conserve water, bro!

[inventorr77]

I know... I know... it was a one-time demo.

[davejohnduke]

This is interesting, however, if no heat is being applied to boil the water, the water must be loosing heat, does this mean if you continue to boil it, then i would expect it to freeze?

[CireRice]

@inventorr77 I think .. the mouth was the suction force creating device........in which case not enough suction would be created.

[mooninquirer]

@davejohnduke A good experiment to see if it would freeze would be to put a very thin layer of water on styrofoam ( acting as a heat insulator ). But I don't think his apparatus with produce the strong enough of a vacuum to achieve an actual freezing of the water.

[mooninquirer]

@inventorr77 There is only so much air dissolved in the water, so the proof of actual boiling would be if there are bubbles forming hours from what you are showing here, or when half the water is gone.

[willibill1]

If its not hot, its not boiling duffes.

[skatedude74]

we did this in my chemistry class today.. blew my mind

[Armahx]

In Denver CO. water boils at 203.4 degrees F because of the lower psia. Its all about the air pressure, more pressure the more compacted the molecules are, lower the pressure the easier they are to release to vapor form because the molecules are further apart. So lower the pressure so that it boils at 40 degrees F, put a compressor in the vapor line and a device to lower the pressure from the high side to the low side and you got an air conditioner. Fans not included.

[UnEmbezzleTV]

when you say "boiling" is this boiling from physical observance/touch

[adminkatalog]

This is called cavitation. Boiling at room temperature caused by decreased preassure. In industrial application this is used for drying surfaces after washing. Principle is easy. Just take a vacuum pump like this vakuum-bohemia.cz/vacuum_pumps­_ORFE.php and connect it to the larger tank. Put wet items in the tank and suck the air bellow 40 mbars. And haha vacuum makes the water on surface to boil.