As water is H2O ie hydrogen and oxygen why does it not burn or reach a flash point when heated how can 2 flamable elements become so stable when combined
126303
Hydrogen is the lightest and flamable, in other word, can be burned, element in its natural form, which is gas. Once it 's been turned into liquid itself, hydrogen does not hold its characteristics well because of the temperature is being used to keep the liquid form. So hydrogen, itself, already not stable.\nOxygen, on the other side, have most its characteristics in liquid or gas form. It is not flamable in the sense that it can not cause fire. But it can be burned and is needed for the existence of fire. So Oxygen is a little more stable.\nNow once Oxygen and Hydrogen combine together, because Hydrogen is very light, and Oxygen is heavier (it really involves all the atoms, especially electrons), Hydrogen tends to assume some characteristics of Oxygen. This includes the stable condition.\nAlthough after combined, they show to be very stable and hold very tight to each other, there was a explosion during the process of combining. As we know, water is the molecular compound, H2O, which means two molecules of hydrogen and a molecule of Oxygen in the mixture. In the normal process of making true water, an estimated amount of Hydrogen and Oxygen gases are put into tank with the ratio of 2:1. However, it is only estimated, so sometimes one gas can be a little more than the other. Also, they are both put in tank in very small amount at the time, then add some more. So the reaction would be slow and controllable.\nIf the two gases are put in at the same time, exact Hydrogen and Oxygen at the ratio of 2:1, and large amounts, they can become Water Bomb. Thus, water does reach a flash point (just not when heated).\nYour question is not stupid. It is very interesting and very smart. Normal people would not care to think out of the box or would not know more than they should. You should reward yourself for being brave enough to ask. But this is the important thing: I recommend you not to try the Water Bomb because it requires very detail and exact conditions. It should only be done in lab with supervisor. The explosion can be big...
116668
Hi Krish_darwin, here is my answer to your problem ;)-\n\nFirst of all, we have to define what we mean by the thermal stability of a hydroxide, the thermal stability refers to that property of a hydroxide due to which, it resists its breakdown into its oxide and hydrogen i.e.\n\nMOH + Heat --------> M2O + H2\n\nAs we know that, in the 1st gp, as we move up, oxides are more stable because, the polarising power of the cation increases up the group.\n\nSo, that means that, as we move up, hydroxides become less stable and oxides become more stable. (see reaction)\n\nTherefore, we can say that thermal stability increases down the group.\n\nNow, coming to stability, as we know, lattice enthalpy decreases down the group, obviously, the stabilty of the hydroxide decreases down the group. Thus, this reaction can take place more easily down the group-\nMOH --------> M+     +     OH-
239401
During electrolysis, the oxygen atom in H20 has 2 pairs of unbonded electrons, and it is these electrons that act as "solvents" breaking the bond between atoms and attacking the postive ion that forms as a result.  So you can visualize a solution as islands of ions surrounded by water ions, with the extra electrons of oxygen surrounding the positive ions and the negative ions surrounded by the hydrogens of water.  \n\nA "strong" electrolyte is one that dissociates almost completely into ions i.e the water molecules break its bond and surround its ions easily.  HCl is a good example.  HF is an exception.  Since F is the element with the strongest electronegativity (4.0) it forms very strong bonds.  And, apparently, water molecules just don't have the ability to break the H-F bond, so very little of HF ionizes in water.    Talking about HF, it is one of the few compounds (and as far as I know, the only compound) that can attack glass (Si03) to form fluorosilicates.
65991
Why is H2O a liquid at room temperature as opposed to other similar molecules? Well, it is mostly to do with the difference in electronegativity between the Hydrogen atoms and the Oxygen atom.  Since there is a sufficient difference, this causes the molecule to be polar.  The Oxygen in one water molecule affects the hydrogen atoms in another molecule.  This bonding, since it's unusually strong, (yet not an ion) is called hydrogen bonding.  The network of interactions between the hydrogen and oxygen atoms creates the necessary attraction to hold a group of water molecules together in a loose formation (ah as in a liquid).  This occurs at a low enough temperature and just the right pressure.  Any less pressure, the attraction between the water molecules would be insufficient to maintain water as a liquid and it will boil away.
310157
1. Sodium will combine with Iodine, but Iodine never has a -3 charge. That would involving adding electrons to the 6st orbital, which would be considerably less stable than adding 1 electron to fill the 5p orbitals.\n\nSodium also doesn't form a +2 charge.\n\nBased on your data, it would be:\n\n3Na^+2 + 2I^-3 = Na3I2 \n\nI think it's:\n\nNa+ + I- ---> NaI or 2Na + I2 (solid) ---> 2NaI \n\nionic\n\n\n2. Protons will activately react with hydride donors to give hydrogen gas. That's why Lithium aluminium hydride is so reactive to water ... it considers the water's hydrogen atoms as a source for protons.\n\nH+ + H-1 ---> H2   covalent and non-polar.\n\n3.\nC^+4 + 20^-2 ---> CO2\n\nCovalent and non-polar
591866
Simple really...the H has already burned!  That's what formed the water.\n\nBurning is a chemical reaction...basically elements recombine w/ other elements.  The water is the end result of the burning, and cannot burn further.
188790
Fire is a chemical reaction between Oxygen+Heat+Fuel
515816
The gas that forms in boiling water is still water but it is in its gaseous state. Remember that water can be solid (ice when temperature is 0C or below), liquid (when temperature is above 0C), and gas (steam - when its temperature is 100C or above). When you heat the water, its temperature rises. When the temperature reaches 100C, water starts to boil because it reaches its boiling point - where it changes from liquid to gas. That's why you see bubbles.\n\nAlso, please note that heating is not enough to break the bonds of H2O. It needs very high energy to do so. Hence, H2 and O2 are not formed during boiling of water.
505150
FIRE is rapid oxidation.  It is a chemical reaction between oxygen  and other materials (solid or liquid).  The flame you see is the point at which the material is converted into a gas.  This point is called the sublime.\n  To maintain sublimation (flame) you must have a constant supply of materials (solid or liquid) and a constant supply of oxygen.  \n  Fire is made by raising the temperature of a material (solid or liquid) to its point of sublimation in an oxygen filled enviornment.\n  FYI,  RUST is slow oxidation
38592
Uh, your question is miscategorized\nthe metabolic process is not fire \njust because it shares a single characteristic\ninterestingly the products of hydrocarbon combustion \nare CO2 + H2O\n\nIf you get a 90% efficient furnace it will condense water in the exhaust stack
464497
water is poler b/c the hydrogen atoms bond to the oxygen words one side, giving that side a negative charge, while the opposite side has a posative one.\n\nsuger and salt r soluble in water\n\nidk what doesn't desolve in water, sry
364955
Water is not fire extinguisher. It is by chance that water extinguish fire. You know oxygen support burning or combustion while Carbon dioxide against it. If you put enough water that can prevent oxygen on fire, that fire will be extinguished/stopped because there is no more oxygen to support burning. But if the fire is a big one to the extent that no amount of water can cover it to prevent oxygen totally then water will fail to extinguish that fire. That is why water alone can not be used as fire extinguisher any where. it can only be part of materials used for fire extinguisher.\n\nbye
512648
You are exactly right. The energy given to the system when you hit them together was enough energy to break the bonds of the oxide layers on top. The thermal energy of the reaction elevated the electron energy states for a small amount of time, causing them to fall back down to their ground state and giving off some photons...hence the spark.
549597
Chemically combined means that the two substances have reacted together to give a new substance, as opposed to just mixing.  Like, if you mixed hydrogen and oxygen together without a reaction, you'd still have hydrogen gas and oxygen gas.  But if they react together, they're chemically combined to give water.\n\nThis really should have been in chemistry rather than mathematics.
619004
One example is Photosynthesis, an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. \n\nThis reaction requires a tremendous amount of energy, 572 kJ to be exact. \n\n\n2H2 + O2 = 2H2O + ENERGY\nThis is also an example of an exothermic reaction, a reaction that produces energy. It is also an example of what is called a combustion reaction, where a substance (in this case hydrogen gas) is combined with oxygen. You are probably familiar with this reaction through two tragic examples of the unleashed energy of the combustion reaction of hydrogen, the Hindenburg, and the spaceshuttle Challenger. \n\n\n\n\nCan we create Hydrogen from Water?\nOh Yes! It's the same chemical reaction, but run in reverse: \n\n2H2O + ENERGY = 2H2 + O2 \nNotice now that the requirement is for energy to be ADDED TO the reactants. This is an example of an Endothermic reaction. This means that we could use Water as a Fuel! IF (and this is a big if) we could find an easy way to convert the water to hydrogen and oxygen, then the hydrogen could be used as a clean fuel.\n\nOne way to convert Water to Hydrogen and Oxygen is through the process of Electrolysis - using electricity as the source of energy to drive the reaction.
636661
Well to start off any reaction that produces oxygen is potentially combustible, especially one that requires energy (endothermic) so be careful.\n\nTwo suggestions: \nFirst, electrolysis, this is where you break the covalent bond between oxygen and hydrogen with electricity (energy).  The by products are oxygen and hydrogen gas.\n\nMy second idea is simple rust.  Put iron (Fe) into water (H2O) and you will produce Iron-oxide or rust.  The Oxygen combines with the iron.\n\nGood luck.
455959
A stabilizer is often necessary when using H2O2, because that compound tends to decompose, especially in the presence of trace amounts of many metallic ions.  In fact, if even a minute amount of, say, Cu++ is present, the decomposition can be violent.