Ethylene

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Properties

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General

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Name

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Ethene

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Chemical formula

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CH2CH2

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Formula weight

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28.05 g/mol

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Synonyms

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Ethylene, Olefiant gas

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CAS number

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74-85-1

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UN number

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1038

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Phase behavior

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Melting point

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104 K (−169.1 ?C)

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Boiling point

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169.4 K (−103.7 ?C)

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Thermal decomposition

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? K (??C)

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Triple point

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104 K (−169 ?C)

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120 Pa

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Critical point

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282.5 K (9.4 ?C)

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5.06 MPa

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ΔsubH

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44.5 kJ/mol

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ΔfusH

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3.35 kJ/mol

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ΔfusS

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32.2 J/(mol?K)

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ΔvapH

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13.5 kJ/mol

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Solubility

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Insoluble

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Liquid properties

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ΔfH0liquid

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? kJ/mol

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S0liquid

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117.8 J/(mol?K)

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67.4 J/(mol?K)

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Density

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577 kg/m3

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Gas properties

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ΔfH0gas

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52.47 kJ/mol

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S0gas

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219.32 J/(mol?K)

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42.9 J/(mol?K)

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Safety

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Acute effects

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Breathing & cardiac troubles. CNS injury

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Chronic effects

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Flash point

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−136 ?C

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Autoignition temperature

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450 ?C

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Explosive limits

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2.7–36%

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More info

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Properties

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NIST WebBook

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MSDS

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Hazardous Chemical Database

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SI units were used where possible. Unless otherwise stated, standard conditions were used.

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Disclaimer and references

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Ethylene or ethene is the simplest alkene hydrocarbon, consisting of two carbon atoms and four hydrogens. There is a double bond between the two carbons. Because it contains a double bond, ethylene is called an unsaturated hydrocarbon or an olefin.

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The molecule cannot twist around the double bond, and all six atoms lie in the same plane. The angle made by two carbon-hydrogen bonds in the molecule is 117?, very close to the 120? that would be predicted from ideal sp2 hybridization.

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Ethylene: Nomenclature ►

C: :This page is about the letter C itself. For other uses of C, see C (disambiguation)....

H: H is the eighth letter of the Latin alphabet....

G: G is the seventh letter in the Roman alphabet....

~ Table of Content ~

►	Introduction
►	Nomenclature
►	Chemistry
►	Production
►	Uses

►	FR: Éthylène

~ Related Subjects ~

Hydrocarbon (1) - Carbon (1) - Standard (1) - Alkene (1) - Angle (1) - Hybridization (1) - Atom (1) - Hydrogen (1) - SI (1) - G (1) - Mol (1) - C (1) - H (1) - Kg (1) - M (1) -

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