Methane

Methane
Names
	IUPAC name Methane (substitutive); Tetrahydridocarbon (additive);
Identifiers
CAS Nummer	74-82-8 ;
3D model (JSmol)	Interactive eemage;
3DMet	B01450
Beilstein Reference	1718732
ChEBI	CHEBI:16183 ;
ChEMBL	ChEMBL17564 ;
ChemSpider	291 ;
EC Nummer	200-812-7
Gmelin Reference	59
KEGG	C01438 ;
MeSH	Methane
PubChem CID	297;
RTECS nummer	PA1490000
UN nummer	1971
	InChI InChI=1S/CH4/h1H4 Key: VNWKTOKETHGBQD-UHFFFAOYSA-N ;
	SMILES C;
Properties
Chemical formula	CH4
Molar mass	16.04 g·mol−1
Appearance	Colorless gas
Odour	Odorless
Density	0.6556 g L−1
Meltin pynt	−182.5 °C; −296.4 °F; 90.7 K
Solubility in watter	22.7 mg L−1
Solubility	soluble in ethanol, diethyl ether, benzene, toluene, methanol, acetone
log P	1.09
kH	14 nmol Pa−1 kg−1
Structur
Molecular shape	Tetrahedron
Dipole moment	0 D
Thermochemistry
Speceefic heat capacity, C	35.69 J K−1 mol−1
Staundart molar; entropy So298	186.25 J K−1 mol−1
Std enthalpy o; formation ΔfHo298	−74.87 kJ mol−1
Std enthalpy o; combustion ΔcHo298	−891.1–−890.3 kJ mol−1
Hazards
GHS pictograms
GHS signal wird	DANGER
GHS hazard statements	H220
GHS precautionary statements	P210
NFPA 704	4 1 0
Flash pynt	−188 °C
Explosive leemits	5–15%
Relatit compoonds
	Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
	verify (whit is ?)
	Infobox references

Methane (/ˈmɛθeɪn/ or /ˈmiːθeɪn/) is a chemical compoond wi the chemical formula CH
₄. It is the simplest alkane an the main component o naitural gas. The relative abundance o methane maks it an attractive fuel. Houiver, acause it is a gas at normal condeetions, methane is difficult tae transport frae its soorce.

Methane is a potent greenhouse gas, mair potent than carbon dioxide unit per unit.^[3] The concentration o methane in the Yird's atmosphere in 1998, expressed as a mole fraction, wis 1745 nmol/mol (pairts per billion, ppb). Bi 2008, houiver, global methane levels, which haed stayed maistly flat syne 1998, haed risen tae 1800 nmol/mol.^[4]

References[eedit | eedit soorce]

↑ ^a ^b "methane (CHEBI:16183)". Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. 17 October 2009. Main. Retrieved 10 October 2011.
↑ "Safety Datasheet, Material Name: Methane". USA: Metheson Tri-Gas Incorporated. 4 December 2009. Archived frae the original (PDF) on 26 December 2018. Retrieved 4 December 2011.
↑ NON-CO2 GREENHOUSE GASES IN THE ATMOSPHERE, Annual Review of Energy and the Environment, Vol. 24: 645-661 (Volume publication date November 1999, DOI: 10.1146/annurev.energy.24.1.645
↑ Carbon Dioxide, Methane Rise Sharply in 2007 Archived 2011-08-11 at the Wayback Machine. Noaanews.noaa.gov (2008-04-23). Retrieved on 2012-05-24.

Freemit airtins[eedit | eedit soorce]

Methane at The Periodic Table o Videos (Varsity o Nottingham)
Gavin Schmidt, Methane: A Scientific Journey frae Obscurity tae Climate Super-Starndom Archived 2004-09-10 at the Wayback Machine, NASA Goddard, September 2004
Methane thermodynamics
Internaitional Chemical Safety Caird 0291
Methane Hydrates
Safety data for methane Archived 2007-10-11 at the Wayback Machine
Catalytic conversion o methane tae mair uiseful chemicals an fuels
CDC – Haundbeuk for Methane Control in Minin

[methane_(CHEBI:16183)-1] "methane (CHEBI:16183)". Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. 17 October 2009. Main. Retrieved 10 October 2011.

[2] "Safety Datasheet, Material Name: Methane". USA: Metheson Tri-Gas Incorporated. 4 December 2009. Archived frae the original (PDF) on 26 December 2018. Retrieved 4 December 2011.

[3] NON-CO2 GREENHOUSE GASES IN THE ATMOSPHERE, Annual Review of Energy and the Environment, Vol. 24: 645-661 (Volume publication date November 1999, DOI: 10.1146/annurev.energy.24.1.645

[4] Carbon Dioxide, Methane Rise Sharply in 2007 Archived 2011-08-11 at the Wayback Machine. Noaanews.noaa.gov (2008-04-23). Retrieved on 2012-05-24.

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