Boiling Water Without Heat Using Vapor Pressure Experiment

[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.

[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.

[tangnatalaga]

I used an a/c vacuum pump and how come the water did do that? Another question. When liquid turns into gas there is a thing called "latent heat of vaporization". So in theory the water turning into vapor is suppose to absorb tremendous amount of heat. Meaning there should be drop in temperature as well. This is what happens when liquid boils, it absorb a lot of heat, and if a liquid boils at room temperature, then refrigeration is suppose to take place.

[inventorr77]

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

see: Atmospheric_pressure_boiling_p­oint

[EnterTheTerrible]

I don't understand. How can something boil without use of heat? The molecules need to speed up in order for somethin to boil, right?

[steeeeevve]

How did the idea of triple point evolve/come to be important?

Why is ice in water in a sealed vacuum flask not at triple point?

[TheAviator8]

I LOVE BOOBS

[steeeeevve]

what units are the pressure??

[TheHappyShack]

@steeeeevve inches of mercury negative thirty i complete vacuum, which is impossible in practise, his scale is obviously broken however, it is still probabily a good vacuum

[endimion17]

Water aspirators can't cause the water to boil. Their theoretical limit is the vapor pressure of the water itself at the given temperature.. Approaching the limit is extremely hard even with excellent aspirators. Just like you can't suck water for more than ~10 meters, you can't evacuate the tank lower than the vapor pressure of the water. That was violent outgassing, being violent because gas expands in vacuum. At normal pressure, they would be tiny, just like they are when tap water is heated.

[1FuckAlgeria]

فكره عمل الشيشه هههههههههه

[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?

[finger11yo]

@inventorr77 siphon

[CireRice]

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

[TedFnBuckle]

is this away to heat water, or is the water been heated, or is it just sucking the air form it. i mean , could you get a vacum pump run the water through a heat exchanger and heat a pool with it. or is it a wasite of time.

[jerryplabs]

amazing ur mr johnson!

[FLIPWILSON1]

Way to conserve water, bro!

[inventorr77]

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

[kamalmichael]

like u r work

[psychoticessence]

is there anyway to evaporate all the water without using heat? from what i gathered from reading these comments, the water will simply stop boiling after enough time passes and the air pressures equalize.

i am looking for a way to evaporate the water without using any heat.

[iviewthetube]

I was wondering the same thing. Is applying a vacuum an efficient way to distil water? Could it be used to desalinate ocean water?

[oldfoolngage]

Boiling or degassing......when water boils it gets vaporized violently....and it will all disappear after a while. When you degas water, after a while it will stop bubbling, because it it completely degassed. since the vacuum pump uses water to turn it you should not be able to really reach the "boiling" vapour pressure of water (15 torr?) However, you might, becasue the water in the tap is colder than the water in the bottle,,,,,

[oldfoolngage]

The water is not boiling, it is de-gassing, i.e. the Air that is dissolved in the water bubbles out, like champagne or any fizzy drink.....

[inventorr77]

One could call it "de-gassing" I suppose. The choice of terms depends on which industry you come from. Technically you are de-gassing a liquid, but it is normally referred to as "boiling" ... just not with the most commonly used mindset of raising the temperature to 212 degrees farenheit or 100 degrees celcius to accomplish it.

[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.

[NOBOX7]

@oldfoolngage great comment, i dont think he gets it lol

[VilliVanilli]

Watch out for implosions.

Implosions = Flying glass = Injury.

Great video :0)

[clnmyjts]

brake all the rules and you will find out....  cool stuff

[LookMaNoBrains]

wow 30 years of my life and i never thought about this fact! what we think of water boiling at 100 degree celcius or 212 Fahrenheit, or the amount of heat a matter changes state is really just relative.

[grayjc]

Google a Phase Diagram chart for water. This chart will show the 3 phases of water depending on pressure and temperature.

Lower the pressure and water will boil. Interestingly with Ice if you raise the pressure it will melt too. That's how ice skates work. A skater is sliding on a thin sheet of water, not ice.

thanks for the video. John

[grayjc]

What you are seeing is not really water boiling. Rather, gases

trapped within the water sample is outgassing. The bubbles you see

is not water turning into water vapor, but air that is escaping from

the liquid water.

If you continue your experiments with the same water (undesturbed) you will not see the boiling. If you shake the jar or add new water it will boil again.

Give it a try.

But your correct, a lower pressue will eventually boil water, but......how low can you go.

john

[inventorr77]

I know its an odd way to draw a vacuum but that white plastic part attached to the kitchen faucett is a venturi type suction pump. Running water flows past a small orifice and draws air out of the glass bottle along with it. The details of where to get it are in the video details section.

[thedude77777]

how did u suck the air out?

im lost

[xEternalx]

Is the definition of boiling in this video the same as when you heat it with a stove?

Cause i thought boiling is when you rise the temp .

[arg13415]

It is the same, but at a lower temperature.

I think the boiling point is defined as the vapor pressure of the liquid = vapor pressure of the surrounding atmosphere. Lowering the pressure inside the jar lowers the vapor pressure of the air, and therefore boiling point temperature drops

[Antiflag151]

and can any container work? or just a jar?

[Antiflag151]

Does this work with just water or would it work with any substance

[wmoore998]

it will work with any substance

[Antiflag151]

and is this pulling hg?

[Antiflag151]

does anyone know how much this pump costs, and the approx cost of the water used hahahaha

[Antiflag151]

wow this is a great expierment

[blower05]

Excuse me! Is it not boiling but cavitation due to pressure low enough?

[hjgardner79]

PV=nRT

Yes, it is boiling

[DaZZer02193]

isnt this experiment a waste of ALOT of water tho? it wud be more intelligent to jus boil water becuz it saves up more water that way

[Antiflag151]

its well worth it.

[furChrist]

What is the apperatus called?

[benjoeuk2006]

The Jar should be hot if the water is boiling due to temperature being the kinetic energy of the particles. You are in fact decreasing pressure and decreasing the solubility of the gasses dissolved in the water. Like what happens to divers if they go down and come up too fast; oxygen dissolved in the blood comes out of solution.

[alwinovich]

no,the pump is sucking up all the hot particles, if he would boil it long enouh, the water would freeze

[benjoeuk2006]

That doesn't take away the fact that the "hot particles" will be coliding with the sides of the jar transferring energy to the glass molecules and causing them to vibrate. Hence the Jar should also warm up.

[b111791]

Is that venturi pump pulling 30" of Hg?

[bassmaster1207]

sorry that gage isn't messed up that gage is in mmHg not psi. Convert 30 mmHg to psi and it is roughly .55

[bassmaster1207]

That gage is messed up. Assuming that the temperature there is 70 degrees F then the vapor pressure needed to cause boiling and yes bioling is roughly .5psi

[denxcortes]

gosh.... its kinda complicated.... but what do you use to boil this thing???

[ZetalZ]

Just to clarify things over boiling vs. bubbling: As most people know, water has a different boiling point at different altitudes. The less pressure on water, the lower the temperature has to be to cause it to boil. If you continue on with that trend, you can get very low pressure and be able to boil water at room temperature. So yes, it's boiling.

[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?

[ZetalZ]

There is no heat loss. But it could solidify if you reached the triple point (pressure and temperature needed to reach all three states of a substance at the same time). You could also turn water into ice by adding pressure. That would be the same process that we use to make liquid oxygen.

[nzphlik]

yes, it will eventually freeze. and yes there is heat loss (assuming it is kept as a vacuum, water vapour being constantly pumped out), transition from liquid to gas requires energy (called latent heat)

[vmelkon]

The bubbles are carrying away energy so the water that is left in the jar is in fact losing energy. Eventually it will freeze. I've seen it demonstrated. This is one reason you can't have liquids in space.

[boorens18]

@davejohnduke the water isnt "losing" heat. He's lowering the temperature at which it boils, rather than raising the temperature to the boiling point. (though to answer your question, no it wouldnt turn to ice unless he increased the pressure)

[twilight1234g]

@davejohnduke exactly :D

[Jewishneighbor]

@davejohnduke boiling point is a product of heat and pressure, not simply heat as it is often assumed, example being that water boils at much less than 100 degrees celsius at high elevations. This experiment shows pressure being elevated without any change to temperature, which causes the water to boil. Alternatively, with enough pressure, water will remain in its liquid form cooled even to temperatures as low as -50 degrees celsius. This has to do with vapor pressure and intermolecular forces.

[slizzardman]

@Jewishneighbor That's true, but is it not also true that the phase change from liquid to gas requires quite a lot of energy to come from somewhere? You can not cause water to vaporize without it consuming 540kcal per kg of water. That energy has to come from somewhere. This is, after all, the entire mechanism through which refrigerators cool our food! Phase change! Timindy99 has an excellent video where he freezes water in his lab with the same technique used in this video.

[Abhirage]

@davejohnduke The water is always evaporating but the thing is that at room temperature its really really slow because the atmospheric pressure keeps water from evaporating fast enough but boiling basically give the water molecules energy to fight back against that atmospheric pressure which is why water boils at a lower temperature at higher altitudes. Basically he simulated a higher attitudinal behavior of water in the video.

[MrSmibby]

@davejohnduke Heat is being applied, it comes from the ambient temperature in the room. Also, the reason why the water boils and the top is because the air is warming the top. There are also a few bubbles at the bottom as this is in direct contact with the bench.

[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.

[ldmintz]

and that gauge is fucked up becuz u cant create a perfect vacuum of 30 in of mercury especially with that rag tag shit he is using.

[monkeyfuckingtweetle]

its not boiling its just bubbling as the vapor is pulled through the vacuum...

[kenetha65]

Which would be . . . boiling.

[humantestdummy]

nothing, he take the air out thus causeing a vacume inside the jar..

[tigerbody69]

Is that boiling or bubbling?

[kiege]

boiling is bubbling

[tigerbody69]

really?

'cause I can blow or suck on that tube to make it bubble.

I really dont think they are the same thing.

Simialr, yes, but not the same.

[kiege]

pure water doesn't boil. impure water, such as tap water or bottled water boils because of impurities, such as minerals. boiling is bubling because of heat.

[Gdog69696969]

pure water can boil because the hydrogen bonds can be broken, and thats y is called steam.

[kiege]

i mean boil as in bubbling, not the changing of state...

[com85]

We should lower the pressure at 20 mBar to start the vaporisation of a 20 degré celcuis water.

[Omaga]

spray butain gas on your hand .. ps not a good idea actualy .. the gas that comes out boiles becus u just lowerd the pressure that is was at in the can ( same diff)

[vacuumiceman]

A clever and inexpensive conviguration! I have the same type of aspirators from Fisher Scientific in hopes of making ice. But, my aspirators only produces 24 Hg. Are you sure of your gauge's accuracy? Can you also make ice!

[derjew]

but wow, this video is hella cool. I thought itd tae more vacumm

[seagullguy123]

if u take a water bottle with like a few drops of water in it and close the top and like press it really really really really hard till like u think the cap is gunu blow of and u quickly unscrew the cap u can see steam coming out

[derjew]

thats just the water vapor in the air condensing, basicvaly forming a cloud. The opposite of boiling.

[Rastaman12122020]

yea, cuz this guy took away pressure, but ur talking about adding pressure

[inventorr77]

No it stayed the same temperature during my experiments. That is one of the things I wanted to confirm, so "boiling" doesn't necessarily mean hot.

[quadraxis45]

does the water even get hot

[rudmop]

The water will actually be colder, because only the molecules with greater kinetic energy (moving faster)&(hotter)can escape into the vacuum. The molecules with lower k.e. (slower) & (colder) can't escape the pull of the attraction of the other water molecules. (see freeze water by boiling)