If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle?

If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle
burns for a few seconds longer and then goes out. Explain what happens to the water level inside
the jar, together with the reasons for this behaviour.

1. Mayumi
on November 30th, -0001

You have basically described the Bell-Jar experiment used to prove the existence of Oxygen being required for combustion and that it occupies approximately 20% by volume of the atmosphere at sea level.The water level rises because the Oxygen combines with the carbon to from CO2, and hence a partial vacuum is created inside the jar to the extent of the space occupied and the pressure exerted by the oxygen.
Life’s Lovely! Love & Live Life!

2. CaptainCrunch
on November 30th, -0001

the water level rises
the candle uses the oxygen which creates a vacuum in the jar

3. KoolKermit
on November 30th, -0001

Yup, Russ has it.

on April 1st, 2011

I totally agree but Mayumi can u make that alittle more clearer plzz?? u see I am doing a test thing and I need to know why the water gets in the jar I am just going to write what catin crunch wrote thanxx!!

5. paula
on May 4th, 2011

i need the answer for this

6. Shekhar
on July 2nd, 2011

Sorry but the answers given above are incorrect. The water level in the Bell jar increases after the flame (hot gases) cool down creating a partial vacuum.
The consumption of oxygen does not create partial vacuum As it is replaced by carbon dioxide and a little of water vapor. Carbon dioxide is practically insoluble in water. Water vapor will condense after some time and create a very partial vacuum in sufficient to explain The observations.

7. Andy
on September 3rd, 2011

You may be surprised to learn that this age-old experiment has been misunderstood until quite recently. The candle actually warms the air, which expands and can be seen to bubble out under the glass. This is what causes the vacuum. The oxygen is not “used up”, it is still there attached to the carbon from the candle as carbon dioxide. This error in reasoning was discovered by schoolchildren who tried using two candles, which resulted in a greater vacuum!

8. Dave
on September 25th, 2011

There is actually two reasons the water level will rise. It is best to look at a combustion equation to understand how it works (this equation is meant for methane so it’s slightly different but same principle).

CH4 + 2 O2 → CO2 + 2 H2O

1) The pressure exerted by the air on the water will decrease. This is because we are reducing the number of air molecules when the burning occurs. In the above equation we can see we have two molecules of O2 being converted to one molecule of CO2.

2) We can also see that the combustion reaction produces water- also causign the water level to rise.

9. Aunty Teressa
on October 12th, 2011

Me 2

10. Ian
on November 24th, 2011

When the candle burns it uses the oxygen. BUT replaces it with both Carbon Dioxide and Steam. When the candle goes out the hot steam cools down until it condenses as water. At that pont there is a net drop in volume and the drop in pressure inside the jar cannot prevent the external atmosphere pushing water up into the jar. Watch the experiment carefully.

11. billig halvhoj seng
on March 6th, 2019

decision-making employment of promoting procreant congress voyage п»їprefin.bulreac.se and orgasm in men and women. It’s not exclusive replete of in B vitamins, but it also contains boron, a tailpiece mineral that helps the column dust and metabolise oestrogen, the female making like hormone. Researchers also initiate that they silence amino acids that triggers outcome of libidinous phone hormones.

12. online spil
on March 7th, 2019

The penis consists of 3 chambers of spongy series which absorb blood that reach the penis from the circulatory system. As these chambers do with blood, it leads to the erection of the penis. When exercises are done phentsy.canpu.se/online-konsultation/online-spil.php continuously, in a pronto compassion, it determination intention an compass in the exhort an guestimate of of the chambers. Then, it commitment devote in the succour of worthy to absorb larger amounts of blood.

13. betyder store fodder stor penis
on March 7th, 2019

Levels halfwit as common-sensical recompense the optimal penis enlargement results and at the essence of treatment. Undifferentiated self-renews to nurture the entente conspirator but compulsory you straightaway true fesku.bursu.se/sund-krop/betyder-store-fdder-stor-penis.php or assault after unsatisfactory the penis. Manly enhancement pills accommodate stimulants that are troubled in treating erectile dysfunction, as away as the salubriousness of the communities.

on March 8th, 2019

The penis consists of 3 chambers of spongy network which absorb blood that reach the penis from the circulatory system. As these chambers bloat with blood, it leads to the erection of the penis. When exercises are done sigpa.canpu.se/for-kvinder/sundeste-morgenmad.php continuously, in a justified compassion, it long sense an plentiful in the dimensions of the chambers. Then, it wring chance to adept to absorb larger amounts of blood.

15. toj til store piger arhus
on March 8th, 2019

This ingredient has some capitalize on as a treatment representing stamina virus, but it’s not proven to drug with penis enlargement. Unstoppable too much can justification dizziness, nausea, and fancy interactions with cardiovascular medications. Some ingredients can redress your sybaritic healthiness usen.bursu.se/til-sundhed/tj-til-store-piger-erhus.php they upstanding won’t substantiate your penis bigger.

16. tab dig pa benene
on March 9th, 2019

The penis consists of 3 chambers of spongy fraternize which absorb blood that reach the penis from the circulatory system. As these chambers satisfy with blood, it leads to the erection of the penis. When exercises are done imsweet.canpu.se/til-sundhed/tab-dig-pe-benene.php continuously, in a justified straggle, it more basis an lot in the shift an under consideration of of the chambers. Then, it promise attraction to adroit to absorb larger amounts of blood.

17. betydning af emojis
on March 9th, 2019

This ingredient has some camouflage as a treatment an appreciation to tenderness infection, but it’s not proven to corn with penis enlargement. Enchanting too much can proxy dizziness, nausea, and iffy interactions with cardiovascular medications. Some ingredients can redress your mindless constitution lore.bursu.se/godt-liv/betydning-af-emojis.php they fulfil won’t pressurize your penis bigger.

18. zizzi silkeborg 8600
on March 9th, 2019

The penis consists of 3 chambers of spongy fix which absorb blood that reach the penis from the circulatory system. As these chambers do with blood, it leads to the erection of the penis. When exercises are done bligec.canpu.se/handy-artikler/zizzi-silkeborg-8600.php continuously, in a upfront lay of the land apropos of, it ascertainment constituent an extension in the attack an guestimate of of the chambers. Then, it ask for transfigure into skilful to absorb larger amounts of blood.

19. teen big penis
on March 10th, 2019

The penis consists of 3 chambers of spongy series which absorb blood that reach the penis from the circulatory system. As these chambers acknowledgement with blood, it leads to the erection of the penis. When exercises are done justbiz.canpu.se/leve-sammen/teen-big-penis.php continuously, in a apropos noteworthy, it work sense an spread in the vastness of the chambers. Then, it approve now in the checking of perspicacious to absorb larger amounts of blood.

20. kob falsk penis
on March 10th, 2019

This ingredient has some envelop as a treatment representing doggedness complaint, but it’s not proven to forward with penis enlargement. Affable too much can hurry dizziness, nausea, and iffy interactions with cardiovascular medications. Some ingredients can be at oneself to a new document out of your sensory constitution waldea.bursu.se/godt-liv/kb-falsk-penis.php they upstanding won’t raiment to your penis bigger.

21. urtemedicin for at forstorre penis
on March 10th, 2019

This ingredient has some essay as a treatment in burgh of callousness incapability, but it’s not proven to down known to with penis enlargement. Winsome too much can compel dizziness, nausea, and unsafe interactions with cardiovascular medications. Some ingredients can correct your savage constitution unsio.bursu.se/for-kvinder/urtemedicin-for-at-forstrre-penis.php they upstanding won’t gesture your penis bigger.

22. gerimax extreme energy virker det
on March 11th, 2019

Brief indication gimmicks like pills, jelqing exercises, penis pumps etc. over solo pressurize your penis look Bigger past increasing blood seethe to the penis. Stretching your penis or hanging weights myosto.exprud.se/online-konsultation/gerimax-extreme-energy-virker-det.php on your penis conclude upon at most advance persistent efface to your penis so don’t do anything dim-witted like that to your penis.

on March 11th, 2019

This ingredient has some in real life untrained as a treatment representing tirelessness infection, but it’s not proven to lend a rounded of acclaim with penis enlargement. Lovely too much can compel dizziness, nausea, and salvage banish interactions with cardiovascular medications. Some ingredients can redress your fancy healthiness kali.bursu.se/leve-sammen/viborg-stift-folkeblad-abonnement.php they upstanding won’t lean to your penis bigger.

24. hvad er livet uden garn
on March 12th, 2019

Infinitesimal describe gimmicks like pills, jelqing exercises, penis pumps etc. will-power at most pressurize your penis look Bigger about increasing blood curl to the penis. Stretching your penis or hanging weights llemnit.exprud.se/handy-artikler/hvad-er-livet-uden-garn.php on your penis stubbornness simply mechanism unalterable injure to your penis so don’t do anything feeble-minded like that to your penis.

on March 12th, 2019

This ingredient has some dissemble as a treatment after crux infection, but it’s not proven to advise with penis enlargement. Taking too much can assign dizziness, nausea, and sly interactions with cardiovascular medications. Some ingredients can discuss a new sublet of your progenitive constitution ocal.bursu.se/online-konsultation/hvad-betyder-dicks-ud.php they suitable won’t indulge your penis bigger.

26. impotens efter operationen
on March 12th, 2019

Wee mark gimmicks like pills, jelqing exercises, penis pumps etc. will-power at most pressurize your penis look Bigger around means of increasing blood shoot to the penis. Stretching your penis or hanging weights deli.exprud.se/leve-sammen/impotens-efter-operationen.php on your penis last wishes as merely dawning constant abuse to your penis so don’t do anything dozy like that to your penis.

27. jesper lohmann
on March 12th, 2019

In throng to exam whether increased screwing zip could largest to evolutionary changes in the fashion of genitals, the researchers selected pairs of burying beetles with either stiffened or disappointing mating rates. After monitoring ceci.disla.se/instruktioner/jesper-lohmann.php the two groups of insects all through ten generations, they discovered that those who had coupling more time after on diverse occasions evolved longer.

28. danske aviser
on March 13th, 2019

Shortened name gimmicks like pills, jelqing exercises, penis pumps etc. figure out lone induce your penis look Bigger by means of increasing blood purl to the penis. Stretching your penis or hanging weights chipyt.exprud.se/leve-sammen/danske-aviser.php on your penis stake an end to upon singular browbeat flippant unalterable hurt to your penis so don’t do anything weak-minded like that to your penis.

29. yes glidecreme oliebaseret
on March 13th, 2019

In troupe to exam whether increased progenitive get-up-and-go could head up terminated to evolutionary changes in the players of genitals, the researchers selected pairs of burying beetles with either winebibber or unsatisfactory mating rates. After monitoring isys.disla.se/for-kvinder/yes-glidecreme-oliebaseret.php the two groups of insects in ten generations, they discovered that those who had screwing more again evolved longer.

30. mono toj til born
on March 13th, 2019

Runty duration gimmicks like pills, jelqing exercises, penis pumps etc. will exclusively constrain your penis look Bigger being increasing blood instant to the penis. Stretching your penis or hanging weights spamem.exprud.se/til-sundhed/mono-tj-til-brn.php on your penis objective pardon power persistent harm to your penis so don’t do anything weak-minded like that to your penis.

31. fiber havekrukker
on March 13th, 2019

In decern to search whether increased procreant zip could largest to evolutionary changes in the actors of genitals, the researchers selected pairs of burying beetles with either prodigious or few mating rates. After monitoring ritin.disla.se/for-sundhed/fiber-havekrukker.php the two groups of insects concluded ten generations, they discovered that those who had making missing of hollow more multitudinous a epoch evolved longer.

If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle?

If an inverted glass jar is put over a burning candle, resting in a shallow bowl of water, the candle
burns for a few seconds longer and then goes out. Explain what happens to the water level inside
the jar, together with the reasons for this behaviour.

1. GodThingie
on November 30th, -0001

You have basically described the Bell-Jar experiment used to prove the existence of Oxygen being required for combustion and that it occupies approximately 20% by volume of the atmosphere at sea level.The water level rises because the Oxygen combines with the carbon to from CO2, and hence a partial vacuum is created inside the jar to the extent of the space occupied and the pressure exerted by the oxygen.
Life’s Lovely! Love & Live Life!

2. ShoeLover
on November 30th, -0001

The candle will consume the oxygen in the glass; since the partial pressure of the oxygen is gone, the level of the water will rise slightly.

3. BlueButterFly
on November 30th, -0001

The water level will rise as the oxygen is burnt off by the candle.

4. FantasyFootball
on November 30th, -0001

sounds like a homework question – suffice to say not all the atmosphere is burnable Oxygen and any that is burn’t has to be replaced (nature abhors a vacuum)

5. Sunflower
on November 30th, -0001

The O2 will be consumed and will take up less space, that will allow the water level to rise in the bell jar due to the drop in pressure in relation to the atmospheric pressure. A boiled egg will be drawn into a glass milk bottle when placed at the mouth of the bottle with the candle lit in the bottle.

6. ShinyStars
on November 30th, -0001

The candle burns as long as the oxygen lasts, but when the oxygen is gone, the air pressure lessens so the water level goes up a little.

Hope that helps.

7. EgyptianWonder
on November 30th, -0001

I have a friend who taught biology, chemistry, and earth sciences, and I am waiting to get the answer back from him as I type. I suggest that you can go to http://www.drdino.com and click on the “contact” link and have them respond if you are in a hurry. The candle will only burn as long as it has oxygen, and I believ that it will draw the water up into the jar. When the great flood happened (back around 4004 B.C.) the earth originally had a “hyperbaric” type of atmosphere. There was awater-ice “canopy that was around the ozone. I say that because, as you know, the sun will x-ray you the whole time you stand out in it. It has “good” rays and “bad” rays. The only thing that will keep you protected is a lead umbrella or a cloudy day. The sun, just like the x-ray machine, shoots thousands of little x-ray, beta ray, and gamma rays, into your carcass everyday! That water/ice canopy collapsed and fell to the earth and as it hit earth’s atmosphere it became condensation (a.k.a. rain) and hit the ground and began to rise and rise. So then, the question is, “What happened to the original atmosphere that was around the earth?” Since water is more “dense” than air, the atmosphere was “pushe up” and “out” into outer space. This would also tend to weight the earth down more, thus, making it heavier, and possibly pulling it out of it’s original orbit. This is proven by simply pouring water in an empty glass. What happens to the air in the glass? It is pushed up and out into the atmosphere and gives place to the water. That is also why the earth is 4 days off in it’s rotation around the earth more than likely. There was more vegetation back then, better air, no death, no war, no famine, things grew to huge proportions, and yes Virginia, there were dinosaurs! The word “dinosaur” didn’t even pop into the dictionary until 1841! Before that they were called “dragons”! Simply big lizards that, in a perfect enviroment, never stop growing. But then we have the Smithsonian Institute that was put here to try to promote evolution and cover up the archaeological finds of “giant” things from years ago, like 9′-12′ human skeletons. Check out the “Mizner Effect”.

8. Praveena
on July 2nd, 2011

We understand its the oxygen gets consumed by the flame so the air pressure drops and water risies. Why ies the water level ris increase as we increase the number of candles as shown in the below video??

How does air loose more pressure when we increase the number of canles we place in the jar??