how much energy does it take to produce 1kg of hydrogen?
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However, current best processes for water electrolysis have an effective electrical efficiency of 70-80%, so that producing 1 kg of hydrogen (which has a specific energy of 143 MJ/kg or about 40 kWh/kg) requires 50–55 kWh of electricity.
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Hydrogen, electricity and cars In the future, electricity or heat from nuclear power plants could be used to make hydrogen. Hydrogen can be used in fuel cells to power cars, or can be burned to provide heat in place of gas without producing emissions that would cause climate change.
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The nuclear fusion of hydrogen atoms into helium — the process that powers the Sun — promises an almost limitless supply of clean energy. But no facility has yet been able to achieve the level of heat and confinement needed for a reaction to generate more energy than it takes to produce.
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1 kg of hydrogen contains 33.33 kWh of usable energy, whereas petrol and diesel only hold about 12 kWh/kg (see www.h2data.de). In terms of volumetric energy density however, hydrogen is outperformed by liquid fuels.
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On earth it takes about 10 Newton-meters (N-m) of energy to raise a 1 kilogram mass to a height of 1 meter. Since 1 N-m equals 1 Joule, that's 10 Joules. If it takes 1 second to lift the weight 1 meter, than you have converted 10 Joules of energy to potential energy in one second. That's 10 Watts of power.
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1 kilowatt-hour. On average, one kilowatt-hour of produces a little over one pound of carbon dioxide (CO2).
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Although hydrogen energy is renewable and has minimal environmental impact, other non-renewable sources such as coal, oil and natural gas are needed to separate it from oxygen. While the point of switching to hydrogen is to get rid of using fossil fuels, they are still needed to produce hydrogen fuel.
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To produce 1 kg of hydrogen, nine times the amount of water is necessary, i.e. nine litres.
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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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A kWh equals the amount of energy you would use by keeping a 1,000 watt appliance running for one hour. In metric, 1,000 = kilo, so 1,000 watts equals a kilowatt. For instance, if you turned on a 100 watt bulb, it would take 10 hours to use one kilowatt-hour of energy.
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The potential energy or energy required to lift the object E=mgh. Unit of energy is Joules (J) or Kg m^2 /s^2. Therefore the energy required to lift the object of mass 1kg to the height 1 m is 9.8 Jules.
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The sun releases energy at a mass–energy conversion rate of 4.26 million metric tons per second, which produces the equivalent of 384.6 septillion watts (3.846×1026 W).
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Hydrogen fuel prices range from $12.85 to more than $16 per kilogram (kg), but the most common price is $13.99 per kg (equivalent on a price per energy basis to $5.60 per gallon of gasoline), which translates to an operating cost of $0.21 per mile.
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Quick answer: Between 11 to 21 pence including VAT depending on who supplies your electricity. A 1kW fire running for one hour uses 1kWh of energy used in kilowatt hours. One kWh of energy costs about 11 to 21 pence.
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In short, it takes 113399kj of energy to produce 1 pound of beef, 45359kj to produce 1 pound of pork, and 15839kj to produce 1 pound of chicken. Beef also has the largest water footprint in production, as well as the highest amount of greenhouse gas emissions during production and post-production.
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It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy. The difference between the mass of 4 H atoms and 1 He atom is 0.02862 AMU which is only 0.71% of the original mass.
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The mass (m) of hydrogen is: [ m=5.357142857×2.0 ] = 10.7 grams. Note that: this answer is rounded to 3 significant figures. Therefore, 10.7 grams of Hydrogen are necessary to fully react with 50.0 grams of Nitrogen.