Acetylene

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Acetylene
Identifiers
CAS number 74-86-2 YesY
ChemSpider 6086 YesY
UNII OC7TV75O83 YesY
UN nummer 1001 (dissolved)
3138 (in mixtur wi ethylene an propylene)
KEGG C01548 YesY
ChEBI CHEBI:27518 YesY
ChEMBL CHEMBL116336 YesY
Jmol-3D images Image 1
Properties
Molecular formula C2H2
Molar mass 26.04 g mol−1
Density 1.097 g/L = 1.097 kg/m3
Meltin pynt

−80.8 °C, 192.4 K, −113.4 °F (Triple pynt at 1.27 atm)

Boilin pynt

−84 °C, 189 K, -119 °F (Sublimation pynt at 1 atm)

Solubility in water slightly soluble
Acidity (pKa) 25
Structure
Molecular shape Linear
Thermochemistry
Std enthalpy o
formation
ΔfHo298
+226.88 kJ/mol
Staundart molar
entropy
So298
201 J·mol−1·K−1
Hazards
NFPA 704
NFPA 704.svg
4
1
3
Autoigneetion
temperatur
300 °C (572 °F)
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Acetylene (seestematic name: ethyne) is the chemical compoond wi the formula C2H2. It is a hydrocarbon an the simplest alkyne.[2] This colourless gas is widely uised as a fuel an a chemical biggin block. It is unstable in pure furm an thus is uisually haundled as a solution.[3] Pure acetylene is odorless, but commercial grades uisually hae a marked odor due tae impurities.[4]

As an alkyne, acetylene is unsaturatit acause its twa carbon atoms are bondit thegither in a triple bond. The carbon–carbon triple bond places aw fower atoms in the same straicht line, wi CCH bond angles of 180°. Syne acetylene is a linear symmetrical molecule, it possesses the D∞h pynt group.[5]

References[eedit | eedit soorce]

  1. Acyclic Hydrocarbons. Rule A-3. Unsaturated Compounds and Univalent Radicals, IUPAC Nomenclature of Organic Chemistry
  2. R.H.Petrucci, W.S.Harwood and F.G.Herring "General Chemistry", 8th edn.(Prentice-Hall 2002), p.1072
  3. Peter Pässler, Werner Hefner, Klaus Buckl, Helmut Meinass, Andreas Meiswinkel, Hans-Jürgen Wernicke, Günter Ebersberg, Richard Müller, Jürgen Bässler, Hartmut Behringer, Dieter Mayer "Acetylene" in Ullmann's Encyclopedia of Industrial Chemistry, 2008, Wiley-VCH, Weinheim. doi:10.1002/14356007.a01_097.pub3. Article Online Posting Date: 15 October 2008
  4. Compressed Gas Association (1995) [www.stoodyind.com/safety/msds/Acetylene.pdf Material Safety and Data Sheet – Acetylene].
  5. Template:Housecroft3rd

Freemit airtins[eedit | eedit soorce]