Molecular hydrogen - Revision history

Jmdonev: 1 revision imported

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Jmdonev at 01:59, 28 August 2017

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← Older revision		Revision as of 01:59, 28 August 2017
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	[[Category: 371 third midterm]]		[[Category: 371 third midterm]]
	[[Category:Done ~~2015~~-07-24]]		[[Category:Done 2017-07-01]]
	[[File:h2.png\|400px\|framed\|right\|Figure 1.Model of molecular or diatomic hydrogen, composed of two hydrogen atoms bonded together.<ref>History of the Universe. (July 30, 2015). ''Molecular Hydrogen'' [Online]. Available: http://www.historyoftheuniverse.com/images/h2.png</ref>]]		[[File:h2.png\|400px\|framed\|right\|Figure 1.Model of molecular or diatomic hydrogen, composed of two hydrogen atoms bonded together.<ref>History of the Universe. (July 30, 2015). ''Molecular Hydrogen'' [Online]. Available: http://www.historyoftheuniverse.com/images/h2.png</ref>]]

	<onlyinclude>'''Molecular hydrogen''', sometimes called '''dihydrogen''', is a diatomic molecule that is composed of two [[hydrogen]] atoms held together by a covalent bond with the chemical formula H<sub>2</sub>.</onlyinclude>		<onlyinclude>'''Molecular hydrogen''', sometimes called '''dihydrogen''', is a diatomic molecule that is composed of two [[hydrogen]] atoms held together by a covalent bond with the chemical formula H<sub>2</sub>.</onlyinclude>

	Molecular hydrogen is used in the hydrogenation of fats and oils, and sometimes is used for filling balloons. However, molecular hydrogen is quite flammable. [[Liquid]] H<sub>2</sub> is important in the study of [[superconductor\|superconductivity]] due to its extremely low [[temperature]]. Molecular hydrogen is also used in the production of methanol, in [[~~hydrocracking~~]], and in the production of hydrochloric acid.<ref>WebElements. (May 12, 2015). ''Hydrogen'' [Online]. Available: https://www.webelements.com/hydrogen/uses.html</ref>		Molecular hydrogen is used in the hydrogenation of fats and oils, and sometimes is used for filling balloons. However, molecular hydrogen is quite flammable - it was famously involved in the destruction of the Hindenburg airship in 1937.<ref>Wikipedia. "Hindenburg Disaster" [Online]. Available: https://en.wikipedia.org/wiki/Hindenburg_disaster</ref> [[Liquid]] H<sub>2</sub> is important in the study of [[superconductor\|superconductivity]] due to its extremely low [[temperature]]. Molecular hydrogen is also used in the production of methanol, in [[hydrocarbon cracking]], and in the production of hydrochloric acid.<ref>WebElements. (May 12, 2015). ''Hydrogen'' [Online]. Available: https://www.webelements.com/hydrogen/uses.html</ref>

	Additionally, H<sub>2</sub> can be [[Hydrogen#Hydrogen as a fuel\|used as a fuel]], providing useful energy. To be used as a fuel it requires ~~"burning"~~ in the presence of molecular oxygen, ~~and this process~~ creates heat which can be used for work. The only ~~by-~~product of ~~this reaction~~ is water ~~and some nitrogen oxides~~. Hydrogen can also be used as an [[Hydrogen as an energy currency\|energy currency]].		Additionally, H<sub>2</sub> can be [[Hydrogen#Hydrogen as a fuel\|used as a fuel]], providing useful energy. To be used as a fuel it requires combustion in the presence of molecular oxygen, which creates heat which can be used for work. The only product of the combustion of hydrogen and oxygen is water. Hydrogen can also be used as an [[Hydrogen as an energy currency\|energy currency]].

	For more information on the more advanced topic of how the study of molecular hydrogen is connected to quantum mechanics, see [http://hyperphysics.phy-astr.gsu.edu/hbase/molecule/hmol.html Hyperphysics].		For more information on the more advanced topic of how the study of molecular hydrogen is connected to quantum mechanics, see [http://hyperphysics.phy-astr.gsu.edu/hbase/molecule/hmol.html Hyperphysics].

J.williams: 1 revision imported

2015-08-26T21:31:23Z

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J.williams at 16:57, 12 August 2015

2015-08-12T16:57:01Z

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[[Category: 371 third midterm]]
[[Category:Done 2015-07-24]]
[[File:h2.png|400px|framed|right|Figure 1.Model of molecular or diatomic hydrogen, composed of two hydrogen atoms bonded together.<ref>History of the Universe. (July 30, 2015). ''Molecular Hydrogen'' [Online]. Available: http://www.historyoftheuniverse.com/images/h2.png</ref>]]

<onlyinclude>'''Molecular hydrogen''', sometimes called '''dihydrogen''', is a diatomic molecule that is composed of two [[hydrogen]] atoms held together by a covalent bond with the chemical formula H2.</onlyinclude>

Molecular hydrogen is used in the hydrogenation of fats and oils, and sometimes is used for filling balloons. However, molecular hydrogen is quite flammable. [[Liquid]] H2 is important in the study of [[superconductor|superconductivity]] due to its extremely low [[temperature]]. Molecular hydrogen is also used in the production of methanol, in [[hydrocracking]], and in the production of hydrochloric acid.<ref>WebElements. (May 12, 2015). ''Hydrogen'' [Online]. Available: https://www.webelements.com/hydrogen/uses.html</ref>

Additionally, H2 can be [[Hydrogen#Hydrogen as a fuel|used as a fuel]], providing useful energy. To be used as a fuel it requires "burning" in the presence of molecular oxygen, and this process creates heat which can be used for work. The only by-product of this reaction is water and some nitrogen oxides. Hydrogen can also be used as an [[Hydrogen as an energy currency|energy currency]].

For more information on the more advanced topic of how the study of molecular hydrogen is connected to quantum mechanics, see [http://hyperphysics.phy-astr.gsu.edu/hbase/molecule/hmol.html Hyperphysics].

==Properties==
Below is a table of some of the basic properties of molecular oxygen.

{| class="wikitable"
|-
| Chemical formula || H2
|-
| [[Molar mass]] || 2.016 [[gram|g]]/[[mole|mol]]<ref>Web QC. (May 13, 2015). ''Molar Mass of O2'' [Online]. Available: http://www.webqc.org/mmcalc.php</ref>
|-
| Boiling Point || −259[[Celsius|oC]]<ref name="RE1">Yinon Bentor.(May 12, 2015). ''Hydrogen'' [Online]. Available: http://www.chemicalelements.com/elements/h.html</ref>
|-
| Melting Point || −253°C<ref name="RE1"/>
|}

==References==
{{reflist}}
[[Category:Uploaded]]