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de en:Methane.
{{Chembox
| Verifiedfields = changed
| Watchedfields = changed
|Verifiedfields = changed
|Watchedfields = changed
|verifiedrevid = 464371375
|ImageFile = Methane-2D-dimensions.svg
|ImageFile_Ref =
|ImageSize = 170
|ImageName = Fórmula esquelética estereo do metano con medidas
|ImageFileL1 = Methane-CRC-MW-3D-balls.png
|ImageFileL1_Ref =
|ImageNameL1 = Modelo de bólas e paus do metano
|ImageFileR1 = Methane-3D-space-filling.svg
|ImageFileR1_Ref =
|ImageNameR1 = Modelo de recheo de espazos do metano
|IUPACName = {{Unbulleted list|Methane<ref name="methane (CHEBI:16183)">{{cite web |title=methane (CHEBI:16183) |url=https://www.ebi.ac.uk/chebi/searchId.do?chebiId=16183 |work=Chemical Entities of Biological Interest |publisher=European Bioinformatics Institute |accessdate=October 10, 2011 |location=UK |date=October 17, 2009}}</ref>''(substitutive)''|Tetrahydridocarbon<ref name="methane (CHEBI:16183)" /> ''(additive)''}}
|OtherNames = Carbano, gas dos pantanos
|Section1 = {{Chembox Identifiers
|CASNo = 74-82-8
| CASNo_Ref =
|PubChem = 297
|PubChem_Ref =
|ChemSpiderID = 291
| ChemSpiderID_Ref =
|EINECS = 200-812-7
|UNNumber = 1971
|KEGG = C01438
| KEGG_Ref =
|MeSHName = Methane
|ChEBI = 16183
| ChEBI_Ref =
|ChEMBL = 17564
| ChEMBL_Ref =
|RTECS = PA1490000
|Beilstein = 1718732
|Gmelin = 59
|3DMet = B01450
|RTECS = PA1490000
|SMILES = C
|StdInChI = 1S/CH4/h1H4
| StdInChI_Ref =
|StdInChIKey = VNWKTOKETHGBQD-UHFFFAOYSA-N
| StdInChIKey_Ref =
}}
|Section2 = {{Chembox Properties
|C = 1
|H = 4
|Appearance = Gas incoloro
|Odor = Sen olor
|Density = 0,656 g/L a 25 °C, 1 atm<br />0,716 g/L a 0 °C, 1 atm<br />0,42262 g cm<sup>−3</sup> <br/>(a 111 K)<ref name=airliquide>{{cite web|title=Gas Encyclopedia|url=http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=41|accessdate=November 7, 2013}}</ref>
|MeltingPtK = 90,7
|BoilingPtK = 111,66
|Solubility = 22,7 mg L<sup>−1</sup>
|SolubleOther = soluble rn [[etanol]], [[dietil éter]], [[benceno]], [[tolueno]], [[metanol]], [[acetona]]
|LogP = 1,09
|HenryConstant = 14 nmol Pa<sup>−1</sup> kg<sup>−1</sup>
}}
|Section3 = {{Chembox Structure
|MolShape = Tetraédrica
|Dipole = 0 D
}}
|Section4 = {{Chembox Thermochemistry
|DeltaHf = −74,87 kJ mol<sup>−1</sup>
|DeltaHc = −891,1–−890,3 kJ mol<sup>−1</sup>
|Entropy = 186,25 J K<sup>−1</sup> mol<sup>−1</sup>
|HeatCapacity = 35,69 J K<sup>−1</sup> mol<sup>−1</sup>
}}
|Section5 = {{Chembox Hazards
|Reference = <ref>{{cite web|title=Safety Datasheet, Material Name: Methane|url=http://www.chemadvisor.com/Matheson/database/msds/00244226000800003.PDF|publisher=Metheson Tri-Gas Incorporated|accessdate=December 4, 2011|location=USA|format=PDF|date=December 4, 2009}}</ref>
|GHSPictograms = {{GHS flame}}
|GHSSignalWord = '''DANGER'''
|HPhrases = {{H-phrases|220}}
|PPhrases = {{P-phrases|210}}
|EUIndex = 601-001-00-4
|EUClass = {{Hazchem F+}}
|RPhrases = R12
|SPhrases = S2, S16, S33
|NFPA-H = 1
|NFPA-F = 4
|NFPA-R = 0
|FlashPtC = −188
|AutoignitionC = 537
|ExploLimits = 4,4–17%
}}
|Section6 = {{Chembox Related
|Function = alcanos
|OtherFunctn = {{Unbulleted list|[[Ioduro de metilo]]|[[Diiodometano]]|[[Iodoformo]]|[[Tetraioduro de carbono]]|[[Etano]]|[[Ioduro de etilo]]}}
}}
}}
 
[[Ficheiro:Representaciones del metano.JPG|300px|miniatura|Tres representacións da molécula de metano]]
O '''metano''' é un composto de [[carbono]] e [[hidróxeno]], de fórmula CH4. É un [[hidrocarburo]], o primeiro membro da serie dos [[alcanos]]. É máis lixeiro que o [[aire]], incoloro, inodoro e inflamable. Encóntrase no [[gas natural]] (entre un 75% e un 90%), no [[gas grisú]] das minas de carbón, nos procesos das refinerías de [[petróleo]], e como produto da descomposición da materia nos [[pantano]]s. É un dos principais compoñentes da [[atmosfera]] dos planetas [[Saturno (planeta)|Saturno]], [[Urano]] e [[Neptuno (planeta)|Neptuno]].
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