Boiling Water in Less Than 30 Seconds? - Vapor Pressure Experiment

What??? Yes it's true. Watch this video and you will see that I can BOIL regular tap water in 30 seconds without even applying or generating any heat. It's all done by lowering the atmospheric pressure inside the glass jar down to a negative vacuum pressure of approximately -28.5Hg (minus 28.5 inches of Mercury).

For more information see: VAPOR PRESSURE

You can order the pump from Fischer Scientific on their website here:

The venturi siphon pump I used can be purchased from Fisher Scientific.
It is a Nalgene Aspirator Vacuum Pump 09-960-2
Nalgene Vacuum Pump Polypro S41381 Vendor No. 6140-0010EMD.


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

Category:

Education

Tags:

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

[inventorr77]

MrCensorman: Yes you are correct. There is a point of 'equilibrium' where the air will stop being released from the water based on the vacuum level. Up to a point, as the vacuum pressure is increased more air will be removed.

[DonMecanico]

why are vacuums measured in "inches of Mercury" i cant find the answer anywhere. Impressing video, thank you.

[inventorr77]

@DonMecanico Please search a bit harder and you will surely find the answer you are looking for. You can start by searching for wikipedia and Vacuum mercury

[Cheddabob135]

43 seconds

[inventorr77]

Yes. Yes. I suppose I can change the title to "Boiling water in less than 43 Seconds?" :-)

[MrCensorman]

i think it gets to a certain point where it take the air out of the water am i correct?

[monsi23]

got a question, can u isolate a vacuum pressure, for instance u pump out air and simply close the valve, will the vacuum stay there for ever?

regards

[AdminOnDuty]

@inventorr77

Also, I think the gauge reads 27.5 rather than 28.5 - But thank you very much for the demonstration!

[AdminOnDuty]

@g4m3r43v3r

Regarding turning water to ice with pressure, research "Ice X Lattice" (which is Ice Ten with roman numeral) ;-)

[josephdupont]

So dry your cloths with this! or your vegetables.

[mongooseman897]

wow its not boiling the negative presure is causing it to bubbel change the vaccume o a pump to apply pressure and the water will compress into a slid NOT ICE a solid form of water ( if the glass doesnt shatter ) you my friend are an idiot

[g4m3r43v3r]

So applying very high pressure on water will turn it in to ice?