how much electricity does it take to make hydrogen?
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A 100% efficient electrolyser requires 39 kWh of electricity to produce 1 kg of hydrogen. The devices today require as much as 48 kWh/kg. So, if electricity costs are 0.05 US$/kWh, the power cost for the electrolysis process alone is 2.40 US$/kg of hydrogen.
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For a hydrogen atom, composed of an orbiting electron bound to a nucleus of one proton, an ionization energy of 2.18 × 10−18 joule (13.6 electron volts) is required to force the electron from its lowest energy level entirely out of the atom.
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1 mole of water requires 1 mole of hydrogen (H2) and 0.5 moles of oxygen (O2). This requires 100/18 moles of hydrogen. As the molar mass of hydrogen is 2, it requires 200/18 = 100/9 g of hydrogen. It requires 100/9 g of hydrogen gas and 800/9 g of oxygen gas to make 100 g of water.
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About five percent of hydrogen gas produced worldwide is created by electrolysis. Currently, most industrial methods produce hydrogen from natural gas instead, in the steam reforming process.
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Question: How Much Energy (in KJ) Is Required To Ionize 2.78 Moles Ofhydrogen Atoms? answer: 3.65 X 10^3 KJ I Can Never Get This Answer.
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While the combustion in a hydrogen- or gasoline-powered engine is converted into mechanical energy, in a fuel cell vehicle, the chemical energy from the hydrogen and oxygen is converted into electrical energy. ... While automakers assure the public that hydrogen is as safe as gasoline, they aren't always convincing.
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Energy is always required to break a bond, which is known as bond energy. The electrolysis of water requires a minimum of 237.13 kJ of electrical energy input to dissociate each mole. Each mole of water gives you 2 grams of Hydrogen and 16 grams of Oxygen.
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In daily life, when we refer to Hydrogen, we actually refer to H2 or dihydrogen, The molecule made of two atoms of hydrogen (H2) usually in a gaseous form. The Atom of Hydrogen is the first element in the periodic table, with chemical symbol H and the first element created after the Big Bang.
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A fuel, such as hydrogen, is fed to the anode, and air is fed to the cathode. In a hydrogen fuel cell, a catalyst at the anode separates hydrogen molecules into protons and electrons, which take different paths to the cathode. The electrons go through an external circuit, creating a flow of electricity.
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Now, you have a 1:1 mole ratio between magnesium metal and hydrochloric acid, which means that this many moles of magnesium would theoretically produce 0.08975 moles of hydrogen gas.
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['2H2 + O2 -> 2H2O. This means that for every 2 molecules of Hydrogen gas, one molecule of Oxygen is needed to make 2 molecules of water. ... ', 'Enthalpy of reaction = (Enthalpy of products) - (Enthalpy of reactants) ... ', 'Enthalpy= -285.83-(0+0)', 'This means Enthalpy of formation of water=-285.83kJ/mol.']
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Hydrogen gas can be made by reacting methane (CH4) with high temperature steam: CH4(g) + H2O(g) ---> CO(g) + 3H2(g) How many hydrogen molecules are produced when 256 grams of methane reacts with steam?
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A Chemistry tutor answered he hydrogen is required both to react with the carbon and the oxygen and all of this must be accounted for to produce the 76.6 moles of water. From the equation 4 moles of hydrogen reacts with 1 mole of carbon dioxide to produce 2 moles of water.
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It means that per mole water splitting requires at least 241.8 kJ of energy. Any method(thermal,electrolysis etc) followed, this much of energy will be always required. When using electrolysis, it may be convenient to express it in eV.
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Fuel cell vehicles use hydrogen gas to power an electric motor. Unlike conventional vehicles which run on gasoline or diesel, fuel cell cars and trucks combine hydrogen and oxygen to produce electricity, which runs a motor.
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The atomic mass of hydrogen is 1 g/mole. To make up 1 kilogram or 1000 g of hydrogen element, 1000 moles of hydrogen is required. Each mole has a Avogadro's number of atoms or atoms. Thus, 1 kg hydrogen element or 1000 moles of hydrogen have atoms (or 1000 times the Avogadro's number).
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Using ten 200-watt solar panels (or twenty 100-watt panels) will produce roughly 3,000 kilowatts hours (kWh) of electricity, which is far below how much electricity a standard single-family household uses.