ETHYNE* - (74-86-2)

Введение

имя: ethyne*; acetylene
* IUPAC
Количество CAS: 74-86-2
Химическая формула: C2H2 or HCCH
Молярная масса: 26.03728 g
Состояние материи: colorless gas
Массовая доля: C 92.257 %; H 7.7422 % 

классификация

Использование / функции

• "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

Физические свойства


Точка кипения:*
-83.6°C 4 = 189.55 K = -118.48°F

* - 1 atm pressure

Связующие

Двойные связи: 0
тройные связи: 1
Сигма облигации: 3
Облигации Pi: 2
Всего: 5
карбоксильных групп: 0
гидроксильные группы: 0
Geometry: linear
гибридизация: carbons are sp
Связующие: polar covalent
Ionic Character: 10.61 %

термохимия

ΔHf° (g): 54.19 kcal/mol 5 = 226.73 kJ/mol
S° (g): 48.00 cal/(mol•K) 6 = 200.83 J/(mol•K)
ΔGf° (g): 50.00 kcal/mol 7 = 209.20 kJ/mol
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

Реакции

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источники

(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.