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Hydrogen in its liquid form has been used in space vehicles for years Hydrogen has a high combustion energy per pound relative to any other fuel meaning hydrogen is more efficient on a weight basis than fuels currently used in air or ground transportation Hydrogen is the universes most abundant element Most of that hydrogen though is tied up in chemical bonds Hydrogen can exist in either a gaseous form or a liquid form Hydrogen is The liquid form is usually used for storage while the gaseous form is used as a heat transfer and also as a cooling agent in nuclear power plants The name hydrogen is Greek for water former Hydrogen was once called inflammable air by a British scientist names Joseph Priestly French chemist Antoine Laurent Lavoisier then renamed it to todays name hydrogen Hydrogen can be produced in many ways Electrolysis is a common way hydrogen is produced Electric current is passed through water which releases the lements it is made of These elements are hydrogen and oxygen Todays efficiency of this method is about 65 percent however 80-85 percent are possible with more research Another method of producing hydrogen is through chemical means It is a scientific fact that every metal that is less noble than hydrogen will isplace hydrogen from water Common materials used in this reaction is sodium or potassium Sodium plus water will produce hydrogen NaOH and heat Other reactions include the producer reaction that was discovered in 1800 It involves combining heat carbon and water It then yields hydrogen an carbon monoxide Bacteria can also be a hydrogen producer Bacteria and other microorganisms may release hydrogen in the process of creating heavier hydrocarbons or oxygen for assimilation A process known as Photoconversion or photosynthesis involves light combining with water which produces hydrogen and oxygen
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