Candle and Water

[IgnoranceAlliance]

FAKE.

[pravljicezaotroke]

Simple and effective trick for science class. Now let's solve some differential equations!

[WhynotMiha]

I love how on every child science movie 50% of the comments are saying why does this happen with a vocabulary of a scientist. We know, allright?

[DedanCossey]

But will it blend?

[creampie417]

Raptor72896 Can You Say That Again In English Please???

[cheesyfreak7]

we call our experiment "happy birthday" lol

[ldadiorama]

what theories tell why this took place?

[unitedazn111]

saw this shit in 1st grade!

[mylvl200wizardpwnsjk]

next time make a small plate for the candle so it can float, then see what happens

[JuscLTU]

You are all so smart, and I thought that because the candle heats up the air it expands and when you put the air in contact with water it instantaneously shrinks, thus sucking in the water... But yeah I'm wrong...

[VulcanFleet]

Good idea using the food coloring so we could see better. Unfortunately the sound quality is a bit lacking, but the description says what's going on just fine.

[iluvchrisbrwon]

i saw this in my chemistry class!

[1DecayingPlatapus]

The heat evaporated everything in the bottle so when he put in down it created a vacume sucking up the water lol.

[boyfred2]

what is the experiment called ?

[policediscolightss]

@boyfred2

we call it the water rising lab..:/

[killmanha]

everyone in 5th grade should understand and know this...

[MasterFebo]

what the video claims is true. As soon as the flame goes out the water vapour in the jar condenses and the air retracts, sucking up the water.

It is not caused by surface tension, or vapor pressure, neither by using up of oxygen. The paraffine in the candle burns to provide CO2 and H2O vapor, to increase the total volume of all gasses in the glass by around 6%.

[popstarbria]

That was pretty cool how quickly the glass filled up. :)

[Pig560]

its the atmospheric pressure on surface of the water that pushed it in the glass

[drpinto28]

what i have no clue what that means LOL

nerd

[scorpixxxx]

Oh, my god! CO2 dissolves in water, that's all!

[xeusman]

Simple... the candle used all the oxygen to burn hence creating low air pressure inside the glass,which caused the liquid to be sucked into the glass

[Imperius41]

yup

[A1n3dr5e1234567890]

It burns oxygen, but to not disintegrate his molecules. Another gas is still there !

[sandqwert]

@xeusman

not really... the flame did in fact consume o2, but there where other gases product of the combustion... So, it's not like there's a vaccum inside the glass... The deal is, that the heat from the flame heated the air inside the bottle, thus expanding... once the flame is gone, all that heat starts to transfer to the water, thus compressing the air, and then creating vaccum...

[fairyheli2]

@xeusman wrong again

[limlingyang]

@xeusman

When you burn oxygen you get back the same amount of carbon dioxide.....your theory is so obviously wrong.

[PhilJonesIII]

@limlingyang Not quite. The volume used up by the gasses produced by combustion (not just CO2) is considerably less than the volume of free oxygen. There is a volume loss caused by the gasses contracting as well.

The water rise is caused by atmospheric pressure pushing the water up in to the partial vacuum.

[Raptor72896]

@xeusman Even if the candle used all of the oxygen, the mass and volume of the carbon dioxide remaining in the flask would be nearly identical. This trick is caused by the candles heat expanding the gases inside of the flask, and when the candle is extinguished due to a lack of oxygen inside the flask, the gases return to their initial volume and create a small vacuum/lower air pressure which sucks the liquid into the flask.

[janjohandealgenman]

@xeusman

Yeah... almost

[s1l3n7gh057]

I just did this lab last week in chemistry class. It was fun!

[jdhiv4]

SIMPLE AIR PRESSURE DEMO!! The fire of the candle heats the air in the Erlenmeyer flash (the glass) and that air expands and not as much can still fit inside the volume of it.................THEN when they drop the opening of the glass down on the water....that effectively seals the opening......THEN the air inside the glass cools & shrinks again which means LESS AIR PRESSURE inside the glass.....THEN since the air pressure in the room is MORE than inside the glass....it P U S H E S water up.

[sk8ingchamp]

Right on! : )

[bugsbunny159]

in that whoile paragraph i didnt hear oxygen the fire uses the oxygen which causes a suction and it try to replace it with the water around the glass

[CMSFingerBoards]

It does that because all the hot air stays in the thing and melts it!

[jdhiv4]

Nope....see my post right below.  Enjoy!

[lucidiquedreams]

thats cool

[k3nji019]

wOw

[alliswel]

the oxygen in the flask is used up as it burns so the water is sucked up to fill the space.

[jdhiv4]

good guess, but when the Oxygen is used up (true), then other things are created in the reaction..........so, overall no net loss....see my explanation a few below.

[albinoman13bt]

And your proof that its wrong is the liquid rises slowly, but not instantly and long after the candle is submerged. It's a gradual change, albeit quick.

[koolkriz]

wow i wish i was a nerd!!!!

[kuruptzZz]

I wish I was a dumbass!

[tenishamarie123]

u are mean

[pyro3138]

XD nive comeback :3

[Masimirrimies]

water? why it is blue? :D

[PrinceOfDarkness2k7]

it would be hard to see the water if its clear

[magg0tmacdonald]

it's special blue water from the blue lakes of Mt. Sapphiria, aside from being distinctively blue, it also defies gravity and is magnetized to candle flames. Any other smart-ass questions?

[cars1cars2cars3]

lol

[ryusassori15]

rofl nice, just the right amount of funniness to the response

[DmasterX69]

@magg0tmacdonald

epic reply!!! WIN

[kghsbassboy]

@magg0tmacdonald or maybe they're just witches? BURN THE WITCH! playing of course

[BeNNyBoYe13]

@magg0tmacdonald lol i dont think so XD

[utoobasaurus]

@magg0tmacdonald Yes...do you ever get grass stuck to the bottom of your lawn mower?

[LACHLAN227]

@magg0tmacdonald NANNANANAN

[megaownerguyz]

@magg0tmacdonald yes, i've watched vids about water in ice in seconds and most don't work, if there is any, what is the real solution?

[ReflexXLX]

That sounded like the bad case of the runs

[Aro2220]

it doesn't have to do with temperature. it has to do with a chemical reaction reducing the number of moles of gas molecules in the jar. when you put the jar down on it the pressure is lower than atmospheric pressures so it pulls up the liquid to compensate. temperature doesn't make much sense since you're losing heat very quickly since the system is closed not isolated; in other words, if it was due to temp then the liquid level would begin to drop the second the flame is extinguished. it doesnt

[animelover578]

wow your smart =x

[mogul1265]

Neat

[mitch13815]

hot air is less dence and so raises to the top with the water

[micetx]

Indeed...indeed.

Dr. Reed Spencer (criminal minds) in the house....

[joshie9119]

lol someone always has a very technical explination...

[ukidding]

the oxygen is spent, the flame goes out, the air cools, the pressure inside the jar drops below the pressure outside the jar. The outside pressure forces the water into the jar since it is greater.

There is initially pressure differentiation.

The pressure drops as the temperature drops because the gas molecules slow down due to the absence of heat.

[armd0007]

where did you get this information

[CrzayMazy]

Just basic chemical stuff. You didn't go too school or you were just doing something else while your teacher explained it :)

[xMeaningX]

Coool

[Leizarus]

Awesome...