Nome: ethyne*; acetylene
* IUPAC
Número CAS: 74-86-2
Fórmula química: C₂H₂ or HCCH
Massa molar: 26.03728 g
Estado da matéria: colorless gas
Percentual de massa: C 92.257 %; H 7.7422 % 

• orgânico • alcino

• "Acetylene burns with such intense heat (3000°C) that it is widely used for welding and metal cutting (oxy-acetylene blowtorch). Acetylene is even more important as a versatile industrial chemical suitable for the synthesis of many valuable substances." 1

• "Acetylene is a colorless gas that is used as a fuel in welding torches, among other things." 2

• "C2H2. A colorless explosive gas with a garlic-like odor." 3

Ponto de ebulição:*
-83.6°C 4 = 189.55 K = -118.48°F

* - 1 atm pressure

ligações duplas: 0
ligações triplas: 1
Sigma Bonds: 3
Pi Bonds: 2
Total: 5
Grupos carboxilo: 0
grupos hidroxilo: 0
Geometry: linear
hibridização: carbons are sp
Colagem: polar covalent
Ionic Character: 10.61 %

The heat of combustion is the amount of heat released when one mole of a substance undergoes combustion according to the general reaction equation:
CxHyOz + 0.25(4x+y-2z) O2 (g) → x CO2 (g) + 0.5y H2O (ℓ)

ΔHcomb° (g): -310.605 kcal = -1299.58096 kJ

CaC2 (s) + 2 H2O (ℓ) → Ca(OH)2 (s) + C2H2 (g) 8

Wikipedia

(1) - Estok, George K. Organic Chemistry: A Short Text; W.B. Saunders: Philadelphia, 1959; p 44.
(2) - Kotz, John C. and Purcell, Keith F. Chemlstry and Chemlcal Reactivity, 2nd ed.; CBS College Publishing: New York. NY, 1987; p 98.
(3) - Taber's Cyclopedic Medical Dictionary, 18th ed.; F. A. David Company: Philadelphia, PA, 1997; p 19.
(4) - Estok, George K. Organic Chemistry: A Short Text; W.B. Saunders: Philadelphia, 1959; p 42.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:65.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:65.
(7) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:65.
(8) - Swaddle, T.W. Inorganic Chemistry; Academic Press: San Diego, 1997; p 108.