Water is a fuel ??????

[dedeleco]

I know it is not a fuel.
What I would like to understand is why the burner does not
does not go out when water is added to it. I know from experience that
without a minimum temperature or if it is too cooled the burner
goes out.
What I would also like to understand is why the burner seems
be stimulated when water is added.

The water in small drops, brutally heated in the flame, very hot to resist the cooling due to the vaporization of the water, explodes in vapor violently, which increases the agitation in the flame of the burner even more chaotic, which seems to stimulate him !!

Too much of this stimulation risks blowing out the flame by extinguishing it.

the burner seems
be stimulated when water is added

[sen-no-sen]

water is not a fuel but when the water is vaporized it makes a violent agitation which can have some effect

for example a fryer at more than 100 ° C, set it on fire: it makes a large flame not very dangerous, just put a lid on it to put it out ... put water in it, it splashes oil on fire in all directions, and ignites everywhere: water does not provide additional energy but does cause a violent reaction!

This phenomenon is similar to BLEVE (boiling liquid expanding vapor explosion).

Wiki definition: BLEVE can be defined as a violent vaporization of an explosive nature following the rupture of a tank containing a liquid at a temperature significantly above its boiling point at atmospheric pressure. Bleve can occur with any liquid, flammable or not, when it is heated and forced into a closed enclosure. Two types of BLEVE can be distinguished, the cold BLEVE and the hot BLEVE depending on the temperature at which the enclosure breaks (temperature which is specific to the stored product: called TLS, Overheating Limit Temperature, function of the critical temperature of the product).

http://fr.wikipedia.org/wiki/Bleve

[dedeleco]

Volcanoes and super-volcanoes explode enormous per km2 or even one hundred km2, in Yellowstone, or Tambora, by the same mechanism, liquid water under pressure rising with the magma and which explodes in vapor, at a pressure that has become too low !!

[Janic]

Isn't there a confusion between flammable and combustible? Given its composition, water is quite combustible but not flammable.

[dedeleco]

Isn't there a confusion between flammable and combustible? Given its composition, water is quite combustible but not flammable.

typical fuzzy anti-scientfic sentence, because water on sodium gives flames !!!

[chatelot16]

no ! fuel that means that gives energy when it burns with oxygen

water is already burnt hydrogen

when we break down water to make hydrogen, it absorbs heat: water is not a source of energy, it's the opposite

certain metals like sodium or potassium make hydrogen when we put them in water: it is sodium and potassium which are very good fuels, to the point of burning by taking oxygen from the water and leaving hydrogen: water is used more as an oxidizer

[sen-no-sen]

Isn't there a confusion between flammable and combustible? Given its composition, water is quite combustible but not flammable.

The you are confusing.
The hydrogen component of water is a fuel ... extremely flammable.
Water is a combination of hydrogen and oxygen, incombustible and non-flammable.

It is only by "cracking" molecules that one can separate the combustible (H2) and oxidizing (O) components.

[dedeleco]

Ah, the blurry, muddy, not scientific sentences that trigger reactions to recall reality !!!
Everything is in the redox potentials to be potash on wikipedia (link that I put above) !!!

Sodium, potassium or metallic lithium, very concentrated energy reserves, "crack water" for its oxygen and let its hydrogen burn in the air !!!
Even very finely divided aluminum can do the same, usable in explosives.

And at Superphénix, there are still 6000 tonnes of radioactive sodium capable of doing the same !!!

[Obamot]

[chatelot16]

: Arrowd:

not bad ! an answer to say do not answer