Difference between revisions of "Hydrogen"
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'''Hydrogen''' (''periodic table symbol:'' H<sup>1</sup>) is a chemical element that can be found in the [[atmosphere]] and in frozen [[water]] on [[Mars]]. | '''Hydrogen''' (''periodic table symbol:'' H<sup>1</sup>) is a chemical element that can be found in the [[atmosphere]] and in frozen [[water]] on [[Mars]]. | ||
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| + | Liquid hydrogen has a density of 70 kg/m3. Gaseous hydrogen at standard atmospheric pressure and temperature has a density of 0,089 kg/m3. | ||
==Biological significance== | ==Biological significance== | ||
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Hydrogen can be produced by [[electrolysis]] of [[water]]. | Hydrogen can be produced by [[electrolysis]] of [[water]]. | ||
| − | == Use == | + | ==Use== |
| − | * Hydrogen may be used directly as a [[fuel]] for a propulsion system, or, through the [[Sabatier process|sabatier]] reaction, in the form of [[methane]] for the same purpose. | + | *Hydrogen may be used directly as a [[fuel]] for a propulsion system, or, through the [[Sabatier process|sabatier]] reaction, in the form of [[methane]] for the same purpose. |
| − | * Hydrogen can be used to react with [[iron ore]] or [[Aluminum|aluminium]] ore to create metals and water. | + | *Hydrogen can be used to react with [[iron ore]] or [[Aluminum|aluminium]] ore to create metals and water. |
| − | * Hydrogen can be combined with carbon to create [[carbohydrates]], [[amino acids]] and [[hydrocarbons]], the building blocks all all living organisms. | + | *Hydrogen can be combined with carbon to create [[carbohydrates]], [[amino acids]] and [[hydrocarbons]], the building blocks all all living organisms. |
[[Category:Materials]] | [[Category:Materials]] | ||
Revision as of 18:37, 15 July 2019
Hydrogen (periodic table symbol: H1) is a chemical element that can be found in the atmosphere and in frozen water on Mars.
Liquid hydrogen has a density of 70 kg/m3. Gaseous hydrogen at standard atmospheric pressure and temperature has a density of 0,089 kg/m3.
Biological significance
The metabolism of human beings, animals and microbes depends on water, composed of hydrogen and oxygen. The human body contains about 70% water. Human beings need about 2 liters water per day for drinking, hard working people need even more.
Production
Hydrogen can be produced by electrolysis of water.
Use
- Hydrogen may be used directly as a fuel for a propulsion system, or, through the sabatier reaction, in the form of methane for the same purpose.
- Hydrogen can be used to react with iron ore or aluminium ore to create metals and water.
- Hydrogen can be combined with carbon to create carbohydrates, amino acids and hydrocarbons, the building blocks all all living organisms.
