Water from Hydrogen and Oxygen

And who are you to make that judgement?

OK, Smartarse: Mix, ignite, wait.

As anyone with the first inkling of an idea about the subject would know, the products of combustion of hydrogen and oxygen are water (H₂O) and heat. The water will initially be in vapour form, but if you remove the heat, you will end up with pure crystal clear water (like it was before the electrolysis or whatever separated out the elements, but more pure).

As anyone with any idea about what's involved here would know, the combustion need not be explosive; how do you think the Space Shuttle gets off the launch pad in one piece?

From (the font of all knowledge ) Wikipedia:

"The shuttle stack launches vertically like a conventional rocket from a mobile launch platform. It lifts off under the power of its two solid rocket boosters (SRBs) and its three main engines (SSMEs), the latter fueled by liquid hydrogen and liquid oxygen from the external tank."

I could go on with more examples, illustrations, references etc., but Hey! I'm dealing with the Brain Dead - so why bother?

Go learn some engineering and stop wasting everyone's time here.

Wrong.

Ok, before this gets out of control the correct answer was in fact post #1 by JohnDH.

To combine hydrogen and oxygen to make water, you basically have to mix the gases together and light them with a match. Just mixing the gases together isn't enough - you have to do something to get the chemical reaction started. The problem is that this creates a big explosion. I've seen this done as a demonstration by college professors (under very controlled circumstances), but it's really not something that you should try at home.

http://van.physics.illinois.edu/qa/listing.php?id=460

An internet search of "combine hydrogen and oxygen to get water" produces many more similar resilts.

This is an Engineering forum and the above abusive comments have no place here, especially since those making the comments are WRONG and didn't even bother to perform a simple internet search to verify the answers given by the real Engineers and Scientests above.

I quite agree. Simple question, simply and accurately answered in post #1. Subsequent posts have no place on CR4. If a guest can't be bothered to register and can't accept the truth from an experienced and respected engineer they should politely disappear.

The original question is very clear:

You have one liter of water coveted to hydrogen and oxygen.

Can you get me back one litter of water back from those two gasses obtained from one litter of water ?

But you intended to hurt the guy asked the question then it is another story.

The original question (as you seem to have forgotten it):

"I know we can get Hydrogen and Oxygen from water.

My question : How to get back water from Hydrogen and Oxygen gasses ?"

There was no intention to hurt anyone. My answer was correct. This person (the OP) seems to think they know enough "science" to be able to dissociate the elements of water into the gasses. Had he^[1] been through any elementary chemistry class, or bothered to do the smallest amount of research for himself, he would have found the answer for himself. He did not ask how the gasses could be coveted [sic] back to one litter [sic] of liquid water.

Do you suppose that he would have followed my advice, and extrapolated to your fantasized initial volume? Taken one litre of water, electrolysed it to produce the gasses, contained the products in a sufficiently large vessel and set a match to it? If you believe this is a possible outcome, then I am very sorry for you.

_{Please do not touch any bare energized electrical conductors other than those in SELV circuits. Please do not step into the path of any advancing trains. Please do not drink Brasso, Domestos or any other household or industrial cleaning products. Please do not play with matches. Please wash your hands after using the toilet.}

[1] Or she.

Can you get me back one litter of water back from those two gasses obtained from one litter of water ?

Of course not (see post #14 for further clarification), but if you read the original question this was never asked, only how to convert O and H back into H2O.

But you intended to hurt the guy asked the question then it is another story.

My post #14 clarified any potential misunderstanding regarding the correct (but short) answer in post #1.

Excuse me, but nothing in my comment constitutes a threat against Omar.

If I may ask, are you a genuine mullah? Do tell.

To be a master you have to be a teacher first.

To be a teacher you have to be a student first.

If you mix both, before their time, you will have an explosion of ignorance and stupidity. No water in sight.

May the heavens have mercy on your misguided souls and the result be as nourishing as water. It has taken me a while to make up my mind to even enter into this verbal diarrhea but in the end, if you put conflicting chemicals together you may not get what you asked for, but intelligent answers.

What has happened to this site? I have been censored for much less and admin seems to have no scruples letting this go on. I wonder where this is going to end!? There are clear threats being made here! Hello is any body home????

In complete disgust, Ky.

Why are you here?

This is the only post you have left on our site that has not been moderated

Please don't darken our door step anymore

Actually,water is created to be water,if disassemble it to hydrogen and oxygen it is impossible to bring it back to the original state,same is died man you can brig the life back to him.

The correct reaction here is 2H₂ + O₂ → 2H₂O. In principle, if you electrolyze one liter of water to hydrogen and oxygen, you could recombine them and get back one liter of water. In practice, probably not (stray molecules might not participate in the combustion).

JohnDG's "mix and ignite" is perfectly correct. This reaction may be controlled safely, as in an oxyhydrogen torch; or unsafely, as an explosion. JohnDG might have added a caveat about this, adding "do not try this at home, or with large quantities of oxygen and hydrogen." However, his correct answer in no way constitutes a threat or crime against "Guest."

The verbal reaction to this has been spectacularly stupid and dishonest.