Acetylene
- Formula: C2H2
- Molecular weight: 26.0373
- IUPAC Standard InChIKey: HSFWRNGVRCDJHI-UHFFFAOYSA-N
- CAS Registry Number: 74-86-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Ethyne; Ethine; Narcylen; C2H2; Acetylen; UN 1001; Vinylene
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Phase change data
Go To: Top, IR Spectrum, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 189. | K | N/A | Buckingham and Donaghy, 1982 | BS |
Tboil | 189.6 | K | N/A | Maass and Wright, 1921 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 171.65 | K | N/A | Morehouse and Maass, 1931 | Uncertainty assigned by TRC = 0.5 K; TRC |
Tfus | 191.4 | K | N/A | Maass and Russell, 1918 | Uncertainty assigned by TRC = 1. K; TRC |
Tfus | 191.65 | K | N/A | McIntosh, 1907 | Uncertainty assigned by TRC = 0.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 192.4 | K | N/A | Clark and Din, 1950 | Uncertainty assigned by TRC = 0.5 K; TRC |
Ttriple | 191.35 | K | N/A | Maass and Wright, 1921 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ptriple | 1.2825 | bar | N/A | Clark and Din, 1950 | Uncertainty assigned by TRC = 0.0039 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 308.3 ± 0.1 | K | N/A | Tsonopoulos and Ambrose, 1996 | |
Tc | 308.35 | K | N/A | Goloborod'ko and Khodeeva, 1972 | Visual, as Goloborod'ko and Khodeeva Zh.Fiz.Khim. 1969,43,1340; TRC |
Tc | 308.66 | K | N/A | Khodeeva, 1966 | TRC |
Tc | 309.7 | K | N/A | Maass and Wright, 1921 | Uncertainty assigned by TRC = 0.6 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 61.38 ± 0.10 | bar | N/A | Tsonopoulos and Ambrose, 1996 | |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.1122 | l/mol | N/A | Tsonopoulos and Ambrose, 1996 | |
Vc | 0.113 | l/mol | N/A | Khodeeva, 1966 | Visual, samples thoroughly purified; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 8.91 ± 0.010 | mol/l | N/A | Tsonopoulos and Ambrose, 1996 |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
16.3 | 273. | A | Stephenson and Malanowski, 1987 | Based on data from 258. to 308. K.; AC |
16.7 | 207. | A | Stephenson and Malanowski, 1987 | Based on data from 192. to 308. K.; AC |
16.7 | 210. | A | Stephenson and Malanowski, 1987 | Based on data from 192. to 225. K.; AC |
17.0 | 214. | N/A | Reid, 1972 | AC |
16.4 | 230. | N/A | Ambrose and Townsend, 1964 | Based on data from 215. to 308. K.; AC |
16.8 | 200. | N/A | Ambrose, 1956 | Based on data from 193. to 207. K. See also Boublik, Fried, et al., 1984.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
View plot Requires a JavaScript / HTML 5 canvas capable browser.
Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
214.64 to 308.33 | 4.66141 | 909.079 | 7.947 | Ambrose and Townsend, 1964, 2 | Coefficents calculated by NIST from author's data. |
192.59 to 206.30 | 4.19598 | 699.53 | -21.47 | Ambrose, 1956, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
23.5 | 130. | A | Stephenson and Malanowski, 1987 | Based on data from 98. to 145. K.; AC |
21.8 | 162. | N/A | Jones, 1960 | Based on data from 133. to 191. K.; AC |
25.2 | 193. | N/A | Ambrose, 1956 | Based on data from 151. to 193. K.; AC |
22.7 | 160. | A | Stull, 1947 | Based on data from 130. to 189. K.; AC |
22.1 | 129. | A | Burbo, 1943 | Based on data from 89. to 169. K.; AC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
3.76 | 192.4 | Miskiewicz, Rieser, et al., 2010 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
17.8 | 142.7 | Miskiewicz, Rieser, et al., 1976 | CAL |
19.5 | 192.4 |
IR Spectrum
Go To: Top, Phase change data, Mass spectrum (electron ionization), References, Notes
Data compiled by: Coblentz Society, Inc.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Mass spectrum (electron ionization)
Go To: Top, Phase change data, IR Spectrum, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
NIST MS number | 18810 |
References
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M.,
Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]
Maass and Wright, 1921
Maass, O.; Wright, C.H.,
SOME PHYSICAL PROPERTIES OF HYDROCARBONS CONTAINING TWO AND THREE CARBON ATOMS.,
J. Am. Chem. Soc., 1921, 43, 5, 1098-1111, https://doi.org/10.1021/ja01438a013
. [all data]
Morehouse and Maass, 1931
Morehouse, F.R.; Maass, O.,
The Preparationa and Physical Properties of Ethyl and Methyl Acetylene,
Can. J. Res., 1931, 5, 306. [all data]
Maass and Russell, 1918
Maass, O.; Russell, J.,
Unsaturation and molecular compound formation,
J. Am. Chem. Soc., 1918, 40, 1561-1573. [all data]
McIntosh, 1907
McIntosh, D.,
The physical properties of liquid and solid acetylene.,
J. Phys. Chem., 1907, 11, 306-17. [all data]
Clark and Din, 1950
Clark, A.M.; Din, F.,
Equilibria Between Solid, Liquid, and Gaseous Phases at Low Temperature binary systems acetylene - carbon dioxide, acetylene - ethylene and acetylene - ethane,
Trans. Faraday Soc., 1950, 46, 901. [all data]
Tsonopoulos and Ambrose, 1996
Tsonopoulos, C.; Ambrose, D.,
Vapor-Liquid Critical Properties of Elements and Compounds. 6. Unsaturated Aliphatic Hydrocarbons,
J. Chem. Eng. Data, 1996, 41, 645-656. [all data]
Goloborod'ko and Khodeeva, 1972
Goloborod'ko, N.P.; Khodeeva, S.M.,
Russ. J. Phys. Chem. (Engl. Transl.), 1972, 46, 235-7. [all data]
Khodeeva, 1966
Khodeeva, S.M.,
Visual Observation of Gas-Gas Mixture,
Russ. J. Phys. Chem. (Engl. Transl.), 1966, 40, 1061-3. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Reid, 1972
Reid, Robert C.,
Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00,
AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637
. [all data]
Ambrose and Townsend, 1964
Ambrose, D.; Townsend, R.,
Vapour pressure of acetylene,
Trans. Faraday Soc., 1964, 60, 1025, https://doi.org/10.1039/tf9646001025
. [all data]
Ambrose, 1956
Ambrose, D.,
The vapour pressures and critical temperatures of acetylene and carbon dioxide,
Trans. Faraday Soc., 1956, 52, 772, https://doi.org/10.1039/tf9565200772
. [all data]
Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E.,
The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]
Ambrose and Townsend, 1964, 2
Ambrose, D.; Townsend, R.,
Vapour Pressure of Acetylene,
Trans. Faraday Soc., 1964, 60, 1025-1029, https://doi.org/10.1039/tf9646001025
. [all data]
Ambrose, 1956, 2
Ambrose, D.,
The Vapour Pressures and Critical Temperatures of Acetylene and Carbon Dioxide,
Trans. Faraday Soc., 1956, 52, 772-781, https://doi.org/10.1039/tf9565200772
. [all data]
Jones, 1960
Jones, A.H.,
Sublimation Pressure Data for Organic Compounds.,
J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019
. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Burbo, 1943
Burbo, P.Z.,
Russ. J. Phys. Chem., 1943, 7, 286. [all data]
Miskiewicz, Rieser, et al., 2010
Miskiewicz, Stefan; Rieser, Klaus; Dorfmüller, Thomas,
Thermodynamische Untersuchungen an kondensierten Phasen,
Berichte der Bunsengesellschaft für physikalische Chemie, 2010, 80, 5, 395-405, https://doi.org/10.1002/bbpc.19760800504
. [all data]
Miskiewicz, Rieser, et al., 1976
Miskiewicz, S.; Rieser, K.; Dorfmuller, T.,
Thermodynamische Untersuchungen an kondensierten Phasen,
Ber. Bunsen-Ges. Physik. Chem., 1976, 80, 5, 395, https://doi.org/10.1002/bbpc.19760800504
. [all data]
Notes
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References
- Symbols used in this document:
Pc Critical pressure Ptriple Triple point pressure Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature Vc Critical volume ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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