2006-06-10 06:13:43 · 16 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Hydrogen gas (H2) is very combustable, (Oxygen gas [O2] is not), but water (H2O) does not burn.
When substances are reacted, their chemical propertis change completely. In the case of Hydrogen and Oxygen gas, when these two substances combust, the product is water. Water represents the produce of the two substances burning, it is no longer the original substances, it is totally new.
Just like you cannot burn the ashes of a camp fire like you would be able to new wood, you cannot burn water since it has already been chemically reacted.
The Hydrogen is already bonded with the Oxygen in the case of water, there is no reason for it to furhter react with Oxygen since it is already in a stable state.
2006-06-10 07:02:56 · answer #1 · answered by mrjeffy321 7 · 2⤊ 0⤋
Because water is not the same as Hydrogen and Oxygen separated. Molecules have different properties from their constituent elements.
2006-06-10 06:16:24 · answer #2 · answered by kurticus1024 7 · 0⤊ 0⤋
Because the H & O molecules are tightly bound together. When atoms combine, the resulting molecule has radically different chemical properties. The same way that salt, a required nutrient, is made up of 2 dangerous and poisonous elements, Sodium and Chlorine.
2006-06-10 06:17:37 · answer #3 · answered by Flyboy 6 · 0⤊ 0⤋
because water is the product of combusted hydrogen H2+O2---> H2O
+ oxygen isnt combustable its oxidizer
2006-06-10 07:15:06 · answer #4 · answered by Zeratul 3 · 0⤊ 0⤋
In the case of a working fire some firefighters tell of incidents where the water actually combusted.
2006-06-10 06:17:26 · answer #5 · answered by dhebert244 3 · 0⤊ 0⤋
hydrogen contains only one electron in its outermost orbit and oxygen contains 6 ..hence they can form duplet and octet respectively... since they are unstable...they are highly combustible too.. however when water is formed both the compounds are in this case stable...hence not so active..and therefore not combustible
2006-06-11 00:10:28 · answer #6 · answered by CloudNo.9 1 · 0⤊ 0⤋
"hearth" is the speedy oxidation (or alleviation) of a number of aspects or compounds. it could purely be composed of those compounds and their byproduts, and not the rest. a hearth of oxygen and hydrogen is composed of the two oxygen and hydrogen, plus the fabricated from combustion this is H2O. In "air" you've gotten nitrous compounds, purely because of the fact nitrogen is contemporary. yet whilst all this is contemporary is oxygen and hydrogen, they you purely products compsed of those aspects, products of their breakdown, or products of the ensuing combustion. no longer the rest. you additionally could have "hearth" with different oxidizing chemicals alongside with chlorine or flourine, and particular chemicals can smash down below warmth to produceoxidizing reactions (hearth) with different compounds or aspects. What "hearth" IS, is "gleaming" of electrons devoid of delay shifting their skill states interior the presence of exothermic reactions of a adequate intensity to excite those electrons...
2016-12-13 15:24:56 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Because water is hydrogen that has already burned!
When you burn hydrogen, it combines with oxygen and you get water as a result.
2006-06-10 06:56:29 · answer #8 · answered by rt11guru 6 · 0⤊ 0⤋
When it chemically combines, all its properties change including it combustion property.
2006-06-10 06:15:14 · answer #9 · answered by cosmo5847060 3 · 0⤊ 0⤋
the atoms and molecules in water will not subside to turn into anything but water can be a solid a liquid and a gas
2006-06-10 06:18:56 · answer #10 · answered by Anonymous · 0⤊ 0⤋