A fuel cell that runs on methane actually separates the hydrogen from the carbon using a reformer, then uses the hydrogen in the fuel cell.  What happens to the carbon?  How does the reformer work?  What happens if a molecule besides methane got into the reformer?
204581
A reformer is a huge furnace that provided the heat enery required to seperate the Hydrogen and Carbon from the stable CH4 molecule. \n\nThe ones I have worked with works like this:\nA mixture of the gas CH4 and steam H2O is passed thorough a tube that is filled with catalyst, that goes into the furnace (reformer) where it is heated to around 900C.\n\nAt that temp, and with the steam, the following are formed\nHydrogen, Carbon Monoxide, and Carbon Dioxide. So the carbon forms the CO and CO2.\n\nOther molecules can cause the following: Oxygen: Explosion\nNitrogen: Nothing\nSulpur: Kills catalyst.
654224
Catalyst works by lowering down the activation energy of the reaction. Activation energy is the minimum amount of energy which the reactants should have in order to react & result into products. The catalyt reacts with the reactants to form INTERMIDIATE products which require lower activation energy & easily result into products.The catalyst usually have large surface areas so the reactants are easily ADSORBED on its surface.The bonds between the reactant molecules break & form new products which are realeased from the catalust's surface.
180100
The Hydrogen atom is a donor/acceptor for the electron, it's kinda like a battery, or a hydroelectric energy plant. Imagine the electron is water it wants to get somewhere, and it turns a wheel (ATP Snythase) to create ATP to get there. That is a "big picture" the details you'll have to look up.
294000
Catalytic hydrogenation occurs when an unsaturated compound (like C=C double bond containing compounds) are caused to have hydrogens attached to them in the presence of catalysts like platinum, palladium... under reasonably ambient temperatures.\n\nThe metal catalysts are electron-rich, and they tear apart the H2 gas into H radicals.  The H radicals are highly reactive and attack the pi bonds of the C=C bond, resulting in permanent saturation.\n\nThe best example of this is the preparation of margarine, in which unsaturated oils have H2 gas bubbled into them in the presence of finely divided platinum to yield solid fats.
286354
are  you doing some kind of project on fuel cells?I did a project on hydrogen 3 years ago and had the same problem .What i did at the end was made the design look like a fuel cell(the pem and catalysts) kept some normal cells underneath it and connected it to a bulb.Believe me , everyone thought it was a real fuel cell
591203
Its best to think of hydrogen as a 'battery' rather than a power source.  Because we don't have incredibly abundant supplies of free hydrogen on earth, it is not practical for use as an initial energy source.  You are also right in your assertion that it will always take at least as much energy to create hydrogen as we can get by using it, in accordance with the first law of thermodynamics.  \n\nHydrogen is, however, viable as an environmentally friendly fuel to operate vehicles.  This is because the conversion of hydrogen into energy is essentially pollution free and is of high efficiency.  Thus if we use an environmentally friendly power source, such as solar power, to produce the hydrogen, we can run vehicles in an essentially pollution free manner.  As a result, a switch to hydrogen fuel cell vehicles would allow reductions in the overall emissions of our national power production to be reflected in reduced total energy cycle emissions of our vehicles.
208669
The oxygen is used for the oxidation of glucose molecules, so that they are broken down and release the energy that we need for the metabolic activities inside our body.\nFirst the glucose molecule is acted upon by enzymes which break it into 2 'chains'. The 6 carbon atoms in the chains then react with oxygen to form CO2; and simultaneously an enzyme dehydrogenase removes hydrogen atoms from the glucose molecule which then react with oxygen to form water. \nC6H1206 + 6O2 ----> 6CO2 + 6H20 + energy
292060
space shuttle burns hydrogen. imagine you're standing under it when it launches. endothermic or exothermic?\n\ncorrect reaction formula was already given.
153921
im studying the digestive system right now, so i'll have a go at this question (u may want to chec accuracy).\nthe cell gets the carbon it needs via the blood supply. when we eat, all the nutrients are broken down and molecules such as hydrogen, oxygen and carbon are filtered into the blood stream so that they can be passed on to all the cells in th body.\n\ndoes that help?
296748
atp phosphorylses the glucose to form glucose phosphate - this energises glucose and makes it more reactive, so that the subsequent steps of glycolysis (anaerobic respiration) are able to occur.\n\nif the glucose was not energised, it would not split into two to form triose phosphate, and would not form pyruvate (and therefore lactate) as it is not reactive enough.\n\n\nglycolysis reaction:\n\nglucose +atp => glucose phosphate + adp => 2triose phosphate  => 2 pyruvate\n\nThen NADH, a hydrogen carrier, supplies H+ ions to the pyruvate so it is converted into lactate.
435252
When you draw carbon skeletons, you never really draw the hydrogens, because of time, that's why CH3 is usually given as a straight line, about 120 degrees from both of the other carbons. \n\nIn this case, carbon 3 has H, CH3, CH2CH3, and CH2CH3 attached to it. This molecule is symmetrical, no chirality. So when treated with Br2, in the presence of heat/light it creates radical Br which removes the H from carbon 3. Carbon 3 then becomes a radical, reacting with any Br2 floating by (creating another Br radical, this is called the propagation step). Anyway, radical carbon has planar geometry, which means that there is an equal chance of Br attaching to either side, meaning that Br could become wedged or dashed, and you would see about 50% of each. \n\nNow, because 3-bromo-3-methylpentane has no chiral center, you can flip CH3 and Br, and still have the same molecule (build a model if you're having a lot of trouble with this). So if you drew Br wedged, you could spin the molecule around and have Br dashed, because the molecule has a plane of symmetry. Adding Mg does not change the molecules configuration, so if Br was dashed, MgBr will be dashed. But in this case, the lines would be straight, because both configurations are equally possible (wedged and dashed).\n\nSo you should keep them as solid lines, or at least that's what I'd do.\n\nHope this helps. If you're still having trouble, you can email me through my profile.
655482
You can perform electrolysis of water (or electrolysis of dilute sulphuric acid as it is called). The apparatus used is a Hoffman's voltmeter, with platinum electrodes. On passing an electric current, H+ and OH- ions in the water molecule dissociate and migrate to the corresponding electrodes.\n\nAt cathode: H+  + e- --------> H(g)\nH(g) + H(g) --------> H2(g)\n\n2 volumes of hydrogen are released at cathode.\n\nAt anode: OH- (aq) -----------> OH(g) + e-\nOH(g) + OH(g) -----------> H2O + O(g)\nO(g) + O(g) -------------> O2(g)\n\n1 volume of oxygen released at anode\nThus hydrogen and oxygen are released at a ratio of 2:1
131440
Separating the Hydrogen and the Oxygen from regular water is a simple grade school physic's experiment. I have included a link to a experiment page. Now whether it is illegal in Great Briton, I do not know. Now why we don't use it, you would have to ask the major car manufactures that question. The technology is not new, there has been powerful fuel cells floating in outer space for almost 4 decades. The problem with hydrogen as a fuel, is that if it expands uncontrollably you will have one big explosion on your hands.
376943
if we use carbon as the example-there are four electron in the outer shell.  these would normally consist of one s shell electron and 3 p shell electrons.  instead of doing that, the 4 electrons become hybrids in that they all act the same and take on some s shell and some p shell character, so instead of having 1 and 3 of s and p type, you end up with 4 electrons of sp shell.\n\nif you kept the 1-s and 3-p configuration, the s would act one way and the p's would act another.  since they all become sp electrons, they act the same way, so in the case of something like methane (CH4), each of the hydrogens are equally spaced away from each other, kind of looking like a pyramid (they each are 109.5 degrees away from each other)
319978
Sounds like the typical process of using electrolisis to separate H2O in to Oxygen and hydrogen. The hho is  another way to write H2O
123837
During cellular respiration (how we turn food into energy) O2 is the final electron acceptor. BUT... the O2 is actually turned into 2 molecules of water, so the carbon does not just hop onto the O2. The CO2 comes from the breakdown of carbon-rich sugars and fats in your food. Example... Glucose has 6 carbons...as your body rips carbons off of the glycolysis products, each carbon combines with 2 oxygens to become CO2...so 1 glucose yields 6 CO2.
105774
I have never heard of the idea of burning "Water" in a carbureator.  Actually (not that I am a car expert), I have never heard ot burning anything in the carbureator, isnt that suppose to mix the fuel-air before it gets into the engine for combustion?\n\nAnyhow, when gasoline (or any Hydrocarbon) is combusted/"burnt" one of the products is water.  It doesnt make much sense to burn somethat to produce extra energy if it is already being produced anyway as a byproduct.\nYour not going to get anything extra out of trying to burn water, more like than not, you'll loose a lot of energy by having to heat it up...stealing energy away from other expanding gasses.\n\nOne thing though, if you put water (steam) into your engine, you will be displacing fuel and Oxygen which ordinarily would be combusted.  Having less fuel-air in the engine to cobust would mean less energy would come out of each "cycle" of the engine.  As long as your not very demanding on your engine (not trying to tow a boat up a big hill), this might well be OK, you will use less gasoline and therefore get better "Gass" mileage....in theory.\n\nOf course there is a way to seperate the Hydrogen (and Oxygen) out of water, actually, there are a lot of water to do this, but every way requires more energy input than you will ever get out of combusting the Hydrogen back with the Oxygen.  The basic laws of thermodynamics tell us this is a no win situation and any attemp to try to electrolysize the water using the alternator (a popularly spread theory) is bound to fail, since in essence, your trying to make a perpetual motion machine.  The alternator is powered by the engine, the engine is powered by the fuel.  If the fuel your using is made by the alternator, you have got a cycle going that wont last long.