Propyne
- Formula: C3H4
- Molecular weight: 40.0639
- IUPAC Standard InChIKey: MWWATHDPGQKSAR-UHFFFAOYSA-N
- CAS Registry Number: 74-99-7
- 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. - Isotopologues:
- Other names: Methylacetylene; 1-Propyne; Allylene; Propine; CH3C≡CH; Acetylene, methyl-
- Permanent link for this species. Use this link for bookmarking this species for future reference.
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Gas phase thermochemistry data
Go To: Top, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 44.32 ± 0.21 | kcal/mol | Ccb | Wagman, Kilpatrick, et al., 1945 | Unpublished work of E. J. Prosen; ALS |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
7.976 | 50. | Thermodynamics Research Center, 1997 | p=1 bar. Recommended values are in good agreement with other statistically calculated values [ Wagman D.D., 1945, Daykin P.N., 1962].; GT |
8.769 | 100. | ||
10.14 | 150. | ||
11.61 | 200. | ||
13.78 | 273.15 | ||
14.51 | 298.15 | ||
14.57 | 300. | ||
17.34 | 400. | ||
19.74 | 500. | ||
21.80 | 600. | ||
23.59 | 700. | ||
25.148 | 800. | ||
26.520 | 900. | ||
27.727 | 1000. | ||
28.783 | 1100. | ||
29.711 | 1200. | ||
30.521 | 1300. | ||
31.231 | 1400. | ||
31.855 | 1500. |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
13.76 | 272.28 | Kistiakowsky G.B., 1940 | Other experimental values of heat capacity [ Kistiakowsky G.B., 1940, 2] were measured with large uncertainties.; GT |
14.58 | 299.59 | ||
15.56 | 332.83 | ||
16.52 | 369.21 |
Phase change data
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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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 250.0 ± 0.5 | K | AVG | N/A | Average of 18 out of 19 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 170.2 ± 0.6 | K | AVG | N/A | Average of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 168.5 | K | N/A | Maass and Wright, 1921 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 402.4 ± 0.2 | K | N/A | Tsonopoulos and Ambrose, 1996 | |
Tc | 402.38 | K | N/A | Vohra, Kang, et al., 1962 | Uncertainty assigned by TRC = 0.05 K; TRC |
Tc | 401.1 | K | N/A | Maass and Wright, 1921 | Uncertainty assigned by TRC = 0.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 55.6 ± 0.2 | atm | N/A | Tsonopoulos and Ambrose, 1996 | |
Pc | 55.5400 | atm | N/A | Vohra, Kang, et al., 1962 | Uncertainty assigned by TRC = 0.0499 atm; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.1635 | l/mol | N/A | Tsonopoulos and Ambrose, 1996 | |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 6.12 ± 0.02 | mol/l | N/A | Tsonopoulos and Ambrose, 1996 | |
ρc | 6.113 | mol/l | N/A | Vohra, Kang, et al., 1962 | Uncertainty assigned by TRC = 0.01 mol/l; TRC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
5.50 | 242. | A | Stephenson and Malanowski, 1987 | Based on data from 183. to 257. K.; AC |
4.97 | 272. | A | Stephenson and Malanowski, 1987 | Based on data from 257. to 402. K.; AC |
5.07 | 318. | A | Stephenson and Malanowski, 1987 | Based on data from 303. to 361. K.; AC |
5.23 | 374. | A | Stephenson and Malanowski, 1987 | Based on data from 359. to 402. K.; AC |
5.54 | 264. | A | Stephenson and Malanowski, 1987 | Based on data from 249. to 306. K.; AC |
5.28 | 275. | N/A | Reid, 1972 | AC |
5.71 | 240. | N/A | Van Hook, 1967 | Based on data from 162. to 255. K.; AC |
5.16 | 338. | N/A | Vohra, Kang, et al., 1962 | Based on data from 323. to 400. K.; AC |
5.59 | 235. | N/A | Booth, Burchfield, et al., 1933 | Based on data from 194. to 250. K. See also Boublik, Fried, et al., 1984.; AC |
5.11 | 230. | N/A | Maass and Wright, 1921 | Based on data from 200. to 260. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
161.5 to 254.27 | 4.94648 | 1226.123 | -1.926 | van Hook, 1967 | Coefficents calculated by NIST from author's data. |
249.9 to 398. | 4.02498 | 818.384 | -46.457 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction thermochemistry data
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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:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C3H3- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 380.3 ± 2.1 | kcal/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase; B |
ΔrH° | 381.8 ± 2.3 | kcal/mol | D-EA | Robinson, Polak, et al., 1995 | gas phase; B |
ΔrH° | 381.1 ± 2.1 | kcal/mol | G+TS | Robinson, Polak, et al., 1995 | gas phase; Relative to MeOH at 375.0. isomerization accounted for in kinetic scheme; B |
ΔrH° | 381.0 ± 2.1 | kcal/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 372.6 ± 2.0 | kcal/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase; B |
ΔrG° | 373.4 ± 2.0 | kcal/mol | IMRE | Robinson, Polak, et al., 1995 | gas phase; Relative to MeOH at 375.0. isomerization accounted for in kinetic scheme; B |
ΔrG° | 373.3 ± 2.0 | kcal/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -69.22 ± 0.15 | kcal/mol | Chyd | Conn, Kistiakowsky, et al., 1939 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -69.03 ± 0.14 kcal/mol; At 355 K; ALS |
By formula: Li+ + C3H4 = (Li+ • C3H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28.5 | kcal/mol | ICR | Staley and Beauchamp, 1975 | gas phase; switching reaction(Li+)H2O, from graph; Dzidic and Kebarle, 1970 extrapolated; M |
By formula: C3H4 = C3H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -0.90 ± 0.50 | kcal/mol | Cm | Cordes and Gunzler, 1959 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -0.81 kcal/mol; ALS |
By formula: Co+ + C3H4 = (Co+ • C3H4)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
18.9 (+2.1,-0.) | CID | Haynes and Armentrout, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
(CAS Reg. No. 65887-19-6 • 4294967295) +
= CAS Reg. No. 65887-19-6
By formula: (CAS Reg. No. 65887-19-6 • 4294967295C3H4) + C3H4 = CAS Reg. No. 65887-19-6
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33.8 ± 2.1 | kcal/mol | N/A | DePuy, Gronert, et al., 1989 | gas phase; B |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas Chromatography, 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
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Additional Data
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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 | 18849 |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | BPX-5 | 30. | 339. | Aflalaye, Sternberg, et al., 1995 | 12. m/0.15 mm/0.25 μm, H2 |
Capillary | CP Sil 5 CB | 20. | 323.6 | Do and Raulin, 1992 | 25. m/0.15 mm/2. μm, H2 |
Capillary | PoraPLOT Q | 100. | 311. | Do and Raulin, 1989 | 10. m/0.32 mm/10. μm, H2 |
Capillary | PoraPLOT Q | 160. | 316. | Do and Raulin, 1989 | 10. m/0.32 mm/10. μm, H2 |
Packed | Squalane | 27. | 297. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 86. | 299. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 26. | 340. | Zulaïca and Guiochon, 1966 | Column length: 10. m |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-1 | 328. | Hoekman, 1993 | 60. m/0.32 mm/1.0 μm, He; Program: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Polydimethyl siloxane: CP-Sil 5 CB | 334. | Bramston-Cook, 2013 | 60. m/0.25 mm/1.0 μm, Helium, 45. C @ 1.45 min, 3.6 K/min, 210. C @ 2.72 min |
Capillary | Petrocol DH | 339. | Supelco, 2012 | 100. m/0.25 mm/0.50 μm, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min |
Capillary | OV-101 | 330. | Zenkevich, 2005 | 25. m/0.20 mm/0.10 μm, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Methyl Silicone | 299. | Chen and Feng, 2007 | Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wagman, Kilpatrick, et al., 1945
Wagman, D.D.; Kilpatrick, J.E.; Pitzer, K.S.; Rossini, F.D.,
Heats, equilibrium constants, and free energies of formation of the acetylene hydrocarbons through the pentynes, to 1,500° K,
J. Res. NBS, 1945, 35, 467-496. [all data]
Thermodynamics Research Center, 1997
Thermodynamics Research Center,
Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]
Wagman D.D., 1945
Wagman D.D.,
Heats, equilibrium constants, and free energies of formation of the acetylene hydrocarbons through the pentynes to 1500 K,
J. Res. Nat. Bur. Stand., 1945, 35, 467-496. [all data]
Daykin P.N., 1962
Daykin P.N.,
Potential energy constants, rotational distortion constants, and thermodynamic properties of methylacetylenes,
J. Chem. Phys., 1962, 37, 1087-1094. [all data]
Kistiakowsky G.B., 1940
Kistiakowsky G.B.,
Gaseous heat capacities. II,
J. Chem. Phys., 1940, 8, 610-618. [all data]
Kistiakowsky G.B., 1940, 2
Kistiakowsky G.B.,
The low temperature gaseous heat capacities of certain C3 hydrocarbons,
J. Chem. Phys., 1940, 8, 970-977. [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]
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]
Vohra, Kang, et al., 1962
Vohra, S.P.; Kang, T.L.; Kobe, K.A.; McKetta, J.J.,
P-V-T Properties of Propyne.,
J. Chem. Eng. Data, 1962, 7, 1, 150-155, https://doi.org/10.1021/je60012a044
. [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]
Van Hook, 1967
Van Hook, W. Alexander,
Vapor Pressures of the Methylacetylenes, H3CCCH, H3CCCD, D3CCCH, and D3CCCD,
J. Chem. Phys., 1967, 46, 5, 1907, https://doi.org/10.1063/1.1840952
. [all data]
Booth, Burchfield, et al., 1933
Booth, Harold Simmons; Burchfield, Paul E.; Bixby, Eva May; McKelvey, J.B.,
Fluorochloroethylenes,
J. Am. Chem. Soc., 1933, 55, 6, 2231-2235, https://doi.org/10.1021/ja01333a005
. [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]
van Hook, 1967
van Hook, W.A.,
Vapor Pressures of the Methylacetylenes, H3CCCH, H3CCCD, D3CCCH, and D3CCCD,
J. Chem. Phys., 1967, 46, 5, 1907-1918, https://doi.org/10.1063/1.1840952
. [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]
Gal, Decouzon, et al., 2001
Gal, J.F.; Decouzon, M.; Maria, P.C.; Gonzalez, A.I.; Mo, O.; Yanez, M.; El Chaouch, S.; Guillemin, J.C.,
Acidity trends in alpha,beta-unsaturated alkanes, silanes, germanes, and stannanes,
J. Am. Chem. Soc., 2001, 123, 26, 6353-6359, https://doi.org/10.1021/ja004079j
. [all data]
Robinson, Polak, et al., 1995
Robinson, M.S.; Polak, M.L.; Bierbaum, V.M.; DePuy, C.H.; Lineberger, W.C.,
Experimental Studies of Allene, Methylacetylene, and the Propargyl Radical: Bond Dissociation Energies, Gas-Phase Acidities, and Ion-Molecule Chemistry,
J. Am. Chem. Soc., 1995, 117, 25, 6766, https://doi.org/10.1021/ja00130a017
. [all data]
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [all data]
Conn, Kistiakowsky, et al., 1939
Conn, J.B.; Kistiakowsky, G.B.; Smith, E.A.,
Heats of organic reactions. VIII. Some further hydrogenations, including those of some acetylenes,
J. Am. Chem. Soc., 1939, 61, 1868-1876. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Staley and Beauchamp, 1975
Staley, R.H.; Beauchamp, J.L.,
Intrinsic Acid - Base Properties of Molecules. Binding Energies of Li+ to pi - and n - Donor Bases,
J. Am. Chem. Soc., 1975, 97, 20, 5920, https://doi.org/10.1021/ja00853a050
. [all data]
Dzidic and Kebarle, 1970
Dzidic, I.; Kebarle, P.,
Hydration of the Alkali Ions in the Gas Phase. Enthalpies and Entropies of Reactions M+(H2O)n-1 + H2O = M+(H2O)n,
J. Phys. Chem., 1970, 74, 7, 1466, https://doi.org/10.1021/j100702a013
. [all data]
Cordes and Gunzler, 1959
Cordes, J.F.; Gunzler, H.,
Das propin/propadien-gleichgewicht,
Chem. Ber., 1959, 92, 1055-1062. [all data]
Haynes and Armentrout, 1994
Haynes, C.L.; Armentrout, P.B.,
Thermochemistry and Structures of CoC3H6+: Metallacyclic and Metal-Alkene Isomers,
Organomettalics, 1994, 13, 9, 3480, https://doi.org/10.1021/om00021a022
. [all data]
DePuy, Gronert, et al., 1989
DePuy, C.H.; Gronert, S.; Barlow, S.E.; Bierbaum, V.M.; Damrauer, R.,
The Gas Phase Acidities of the Alkanes,
J. Am. Chem. Soc., 1989, 111, 6, 1968, https://doi.org/10.1021/ja00188a003
. [all data]
Aflalaye, Sternberg, et al., 1995
Aflalaye, A.; Sternberg, R.; Raulin, F.; Vidal-Madjar, C.,
Gas chromatography of Titan's atmosphere. VI. Analysis of low-molecular-mass hydrocarbons and nitriles with BPX5 capillary columns,
J. Chromatogr. A, 1995, 708, 2, 283-291, https://doi.org/10.1016/0021-9673(95)00410-O
. [all data]
Do and Raulin, 1992
Do, L.; Raulin, F.,
Gas chromatography of Titan's atmosphere. III. Analysis of low-molecular-weight hydrocarbons and nitriles with a CP-Sil-5 CB WCOT capillary column,
J. Chromatogr., 1992, 591, 1-2, 297-301, https://doi.org/10.1016/0021-9673(92)80247-R
. [all data]
Do and Raulin, 1989
Do, L.; Raulin, F.,
Gas chromatography of Titan's atmosphere. I. Analysis of low-molecular-weight hydrocarbons and nitriles with a PoraPLOT Q porous polymer coated open-tubular capillary column,
J. Chromatogr., 1989, 481, 45-54, https://doi.org/10.1016/S0021-9673(01)96751-2
. [all data]
Hively and Hinton, 1968
Hively, R.A.; Hinton, R.E.,
Variation of the retention index with temperature on squalane substrates,
J. Gas Chromatogr., 1968, 6, 4, 203-217, https://doi.org/10.1093/chromsci/6.4.203
. [all data]
Zulaïca and Guiochon, 1966
Zulaïca, J.; Guiochon, G.,
Analyse des hauts polymères par chromatographie en phase gazeuse de leurs produits de pyrolyse. II. Application à quelques hydrocarbures macromoléculaires purs,
Bull. Soc. Chim. Fr., 1966, 4, 1351-1363. [all data]
Hoekman, 1993
Hoekman, S.K.,
Improved gas chromatography procedure for speciated hydrocarbon measurements of vehicle emissions,
J. Chromatogr., 1993, 639, 2, 239-253, https://doi.org/10.1016/0021-9673(93)80260-F
. [all data]
Bramston-Cook, 2013
Bramston-Cook, R.,
Kovats indices for C2-C13 hydrocarbons and selected oxygenated/halocarbons with 100 % dimethylpolysiloxane columns, 2013, retrieved from http://lotusinstruments.com/monographs/List .... [all data]
Supelco, 2012
Supelco, CatalogNo. 24160-U,
Petrocol DH Columns. Catalog No. 24160-U, 2012, retrieved from http://www.sigmaaldrich.com/etc/medialib/docs/Supelco/Datasheet/1/w97949.Par.0001.File.tmp/w97949.pdf. [all data]
Zenkevich, 2005
Zenkevich, I.G.,
Experimentally measured retention indices., 2005. [all data]
Chen and Feng, 2007
Chen, Y.; Feng, C.,
QSPR study on gas chromatography retention index of some organic pollutants,
Comput. Appl. Chem. (China), 2007, 24, 10, 1404-1408. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Pc Critical pressure T Temperature Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature Vc Critical volume ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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