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Hydrogen 2 Beginning of Paper Hydrogen in it's 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 univer .... Middle of Paper .... oxygen. Today's 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 .... 1155 words | 5 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95