methane

methane
	Stereo, skeletal formula of methane with some measurements added
Ball and stick model of methane	Spacefill model of methane Carbon, C Hydrogen, H
Names
	Preferred IUPAC name Methane
	Systematic IUPAC name Carbane (never recommended)
	Other names Carbon tetrahydride; Carburetted hydrogen; Hydrogen carbide; Marsh gas; Methyl hydride; Natural gas;
Identifiers
CAS Number	74-82-8 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1718732
ChEBI	CHEBI:16183 ;
ChEMBL	ChEMBL17564 ;
ChemSpider	291 ;
EC Number	200-812-7;
Gmelin Reference	59
KEGG	C01438 ;
MeSH	Methane
PubChem CID	297;
RTECS number	PA1490000;
UNII	OP0UW79H66 ;
UN number	1971
	InChI InChI=1S/CH4/h1H4 Key: VNWKTOKETHGBQD-UHFFFAOYSA-N ;
	SMILES C;
Properties
Chemical formula	CH4
Molar mass	16.043 g·mol−1
Appearance	Colorless gas
Odor	Odorless
Density	0.657 kg/m3 (gas, 25 °C, 1 atm); 0.717 kg/m3 (gas, 0 °C, 1 atm); 422.8 g/L (liquid, −162 °C);
Melting point	−182.456 °C (−296.421 °F; 90.694 K)
Boiling point	−161.49 °C (−258.68 °F; 111.66 K)
Critical point (T, P)	190.56 K (−82.59 °C; −116.66 °F), 4.5992 MPa (45.391 atm)
Solubility in water	22.7 mg/L
Solubility	Soluble in ethanol, diethyl ether, benzene, toluene, methanol, acetone and insoluble in water
log P	1.09
Henry's law; constant (kH)	14 nmol/(Pa·kg)
Conjugate acid	Methanium
Conjugate base	Methyl anion
Magnetic susceptibility (χ)	−17.4 cm3/mol
Structure
Point group	Td
Molecular shape	Tetrahedral at carbon atom
Dipole moment	0 D
Thermochemistry
Heat capacity	35.7 J/(K·mol)
Std molar; entropy	186.3 J/(K·mol)
Std enthalpy of; formation	−74.6 kJ/mol
Gibbs free energy	−50.5 kJ/mol
Std enthalpy of; combustion	−891 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220
Precautionary statements	P210
NFPA 704 (fire diamond)	2 4 0 SA
Flash point	−188 °C (−306.4 °F; 85.1 K)
Autoignition; temperature	537 °C (999 °F; 810 K)
Explosive limits	4.4–17%
Related compounds
Related alkanes	Ethane; Propane; Butane;
Related compounds	Silane; Germane; Stannane; Plumbane;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Angol

Főnév

methane (tsz. methanes)

(gyógyszertan) metán

További információk

methane - Szótár.net (en-hu)
methane - Sztaki (en-hu)
methane - Merriam–Webster
methane - Cambridge
methane - WordNet
methane - Яндекс (en-ru)
methane - Google (en-hu)
methane - Wikidata
methane - Wikipédia (angol)

1 2
↑ Gas Encyclopedia. [2018. december 26-i dátummal az eredetiből archiválva].
1 2 Haynes, p. 3.344
↑ CRC Handbook of Chemistry and Physics, 49th edition
↑ Haynes, p. 5.156
↑ Haynes, p. 3.578
↑ Haynes, pp. 5.26, 5.67
↑ Safety Datasheet, Material Name: Methane. Metheson Tri-Gas Incorporated, 2009. december 4. [2012. június 4-i dátummal az eredetiből archiválva].
NOAA Office of Response and Restoration, US GOV: METHANE. noaa.gov . [2019. január 9-i dátummal az eredetiből archiválva].

[iupac2013-1] 1 2

[2] Gas Encyclopedia. [2018. december 26-i dátummal az eredetiből archiválva].

[crc-3] 1 2 Haynes, p. 3.344

[4] CRC Handbook of Chemistry and Physics, 49th edition

[5] Haynes, p. 5.156

[6] Haynes, p. 3.578

[7] Haynes, pp. 5.26, 5.67

[8] Safety Datasheet, Material Name: Methane. Metheson Tri-Gas Incorporated, 2009. december 4. [2012. június 4-i dátummal az eredetiből archiválva].

[9] NOAA Office of Response and Restoration, US GOV: METHANE. noaa.gov . [2019. január 9-i dátummal az eredetiből archiválva].

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