Ethanol Enthalpy Of Formation - Active Thermochemical Tables

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Selected ATcT [1, 2] enthalpy of formation based on version 1.122 of the Thermochemical Network [3] This version of ATcT results was partially described in Ruscic et al. [4], and was also used for the initial development of high-accuracy ANLn composite electronic structure methods [5].
Species Name Formula Image ΔfH°(0 K) ΔfH°(298.15 K) Uncertainty Units Relative Molecular Mass ATcT ID
EthanolCH3CH2OH (g)CCO-216.89-234.61± 0.21kJ/mol46.0684 ±0.001764-17-5*0

Representative Geometry of CH3CH2OH (g)

spin ON spin OFF

Top contributors to the provenance of ΔfH° of CH3CH2OH (g)

The 20 contributors listed below account only for 71.3% of the provenance of ΔfH° of CH3CH2OH (g). A total of 221 contributors would be needed to account for 90% of the provenance. Please note: The list is limited to 20 most important contributors or, if less, a number sufficient to account for 90% of the provenance. The Reference acts as a further link to the relevant references and notes for the measurement. The Measured Quantity is normaly given in the original units; in cases where we have reinterpreted the original measurement, the listed value may differ from that given by the authors. The quoted uncertainty is the a priori uncertainty used as input when constructing the initial Thermochemical Network, and corresponds either to the value proposed by the original authors or to our estimate; if an additional multiplier is given in parentheses immediately after the prior uncertainty, it corresponds to the factor by which the prior uncertainty needed to be multiplied during the ATcT analysis in order to make that particular measurement consistent with the prevailing knowledge contained in the Thermochemical Network.
Contribution (%)TNID Reaction Measured Quantity Reference
45.52665.2 CH3CH2OH (l) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (cr,l) ΔrH°(303.15 K) = -1367.06 ± 0.26 kJ/molChao 1965, mw conversion
7.22762.1 CH3CHO (g) + H2 (g) → CH3CH2OH (g) ΔrH°(355.15 K) = -16.752 ± 0.100 kcal/molDolliver 1938, note unc
6.42662.1 CH3CH2OH (g) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (cr,l) ΔrH°(305.65 K) = -1408.03 ± 0.40 (×1.756) kJ/molRossini 1932a, Rossini 1934a, note old units, mw conversion
4.3117.2 1/2 O2 (g) + H2 (g) → H2O (cr,l) ΔrH°(298.15 K) = -285.8261 ± 0.040 kJ/molRossini 1939, Rossini 1931, Rossini 1931b, note H2Oa, Rossini 1930
2.22655.13 CH3CH2OH (g) → 2 C (g) + O (g) + 6 H (g) ΔrH°(0 K) = 760.68 ± 0.30 kcal/molKarton 2011
0.62655.12 CH3CH2OH (g) → 2 C (g) + O (g) + 6 H (g) ΔrH°(0 K) = 760.75 ± 0.56 kcal/molKarton 2011
0.51642.1 2 H2 (g) + C (graphite) → CH4 (g) ΔrG°(1165 K) = 37.521 ± 0.068 kJ/molSmith 1946, note COf, 3rd Law
0.41519.7 C (graphite) + O2 (g) → CO2 (g) ΔrH°(298.15 K) = -393.464 ± 0.024 kJ/molHawtin 1966, note CO2e
0.31641.4 CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (cr,l) ΔrH°(298.15 K) = -890.61 ± 0.21 kJ/molDale 2002
0.32941.6 CH2(OH)2 (g, conrot gauche) + CH3CH2CH3 (g) → 2 CH3CH2OH (g) ΔrH°(0 K) = 6.71 ± 1.0 kcal/molRuscic CBS-n
0.32755.11 CH3CHO (g) → 2 C (g) + O (g) + 4 H (g) ΔrH°(0 K) = 642.58 ± 0.30 kcal/molKarton 2011
0.32945.6 CH2(OH)2 (g, disrot gauche) + CH3CH2CH3 (g) → 2 CH3CH2OH (g) ΔrH°(0 K) = 4.38 ± 1.0 kcal/molRuscic CBS-n
0.32655.8 CH3CH2OH (g) → 2 C (g) + O (g) + 6 H (g) ΔrH°(0 K) = 760.83 ± 0.80 kcal/molMatus 2007
0.32941.3 CH2(OH)2 (g, conrot gauche) + CH3CH2CH3 (g) → 2 CH3CH2OH (g) ΔrH°(0 K) = 6.45 ± 1.1 kcal/molRuscic G3X
0.21565.2 CO (g) → C+ (g) + O (g) ΔrH°(0 K) = 22.3713 ± 0.0015 eVNg 2007
0.22945.3 CH2(OH)2 (g, disrot gauche) + CH3CH2CH3 (g) → 2 CH3CH2OH (g) ΔrH°(0 K) = 3.56 ± 1.1 kcal/molRuscic G3X
0.22676.7 [CH3CHOH]+ (g, anti) → 2 C (g) + 5 H (g) + O (g) ΔrH°(0 K) = 511.38 ± 0.80 kcal/molMatus 2007, Matus 2006
0.21641.6 CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (cr,l) ΔrH°(298.15 K) = -890.44 ± 0.26 kJ/molGOMB Ref Calorimeter, Alexandrov 2002
0.22941.1 CH2(OH)2 (g, conrot gauche) + CH3CH2CH3 (g) → 2 CH3CH2OH (g) ΔrH°(0 K) = 6.45 ± 1.2 kcal/molRuscic G3B3
0.22941.2 CH2(OH)2 (g, conrot gauche) + CH3CH2CH3 (g) → 2 CH3CH2OH (g) ΔrH°(0 K) = 6.51 ± 1.2 kcal/molRuscic G3

Top 10 species with enthalpies of formation correlated to the ΔfH° of CH3CH2OH (g)

Please note: The correlation coefficients are obtained by renormalizing the off-diagonal elements of the covariance matrix by the corresponding variances. The correlation coefficient is a number from -1 to 1, with 1 representing perfectly correlated species, -1 representing perfectly anti-correlated species, and 0 representing perfectly uncorrelated species.
Correlation Coefficent(%)Species Name Formula Image ΔfH°(0 K) ΔfH°(298.15 K) Uncertainty Units Relative Molecular Mass ATcT ID
98.6 EthanolCH3CH2OH (l)CCO-269.31-277.07± 0.21kJ/mol46.0684 ±0.001764-17-5*500
50.7 1-Hydroxyethylium[CH3CHOH]+ (g)C[CH+]O609.14594.72± 0.39kJ/mol45.0600 ±0.001718682-96-7*0
50.7 1-Hydroxyethylium[CH3CHOH]+ (g, anti)C[CH+]O609.14594.72± 0.39kJ/mol45.0600 ±0.001718682-96-7*1
33.8 AcetaldehydeCH3CHO (g)CC=O-154.97-165.45± 0.28kJ/mol44.0526 ±0.001775-07-0*0
33.4 Acetaldehyde cation[CH3CHO]+ (g)CC=[O+]832.02822.04± 0.29kJ/mol44.0520 ±0.001736505-03-0*0
33.3 EthoxyCH3CH2O (g)CC[O]1.16-12.26± 0.51kJ/mol45.0605 ±0.00172154-50-9*0
33.3 EthoxyCH3CH2O (g, X 2A")CC[O]1.16-12.74± 0.51kJ/mol45.0605 ±0.00172154-50-9*51
33.1 EthoxyCH3CH2O (g, A 2A')CC[O]5.41-9.02± 0.52kJ/mol45.0605 ±0.00172154-50-9*52
33.0 Ethoxide[CH3CH2O]- (g)CC[O-]-164.11-179.05± 0.52kJ/mol45.0610 ±0.001716331-64-9*0
31.7 WaterH2O (cr,l)O-286.300-285.828± 0.027kJ/mol18.01528 ±0.000337732-18-5*500

Most Influential reactions involving CH3CH2OH (g)

Please note: The list, which is based on a hat (projection) matrix analysis, is limited to no more than 20 largest influences.
InfluenceCoefficient TNID Reaction Measured Quantity Reference
0.4732684.1 CH3CH2OH (g) → [CH3CHOH]+ (g) + H (g) ΔrH°(0 K) = 10.801 ± 0.005 eVRuscic 1994c
0.4662762.1 CH3CHO (g) + H2 (g) → CH3CH2OH (g) ΔrH°(355.15 K) = -16.752 ± 0.100 kcal/molDolliver 1938, note unc
0.3412687.1 CH3OH (g) + [CH3CHOH]+ (g) → CH3CH2OH (g) + [CH2OH]+ (g) ΔrH°(0 K) = 0.848 ± 0.006 eVRuscic 1993, Ruscic 1994c
0.2432664.4 CH3CH2OH (l) → CH3CH2OH (g) ΔrH°(298.15 K) = 42.43 ± 0.07 kJ/molPolak 1971, note unc
0.2432664.9 CH3CH2OH (l) → CH3CH2OH (g) ΔrH°(320.03 K) = 41.36 ± 0.07 kJ/molCounsell 1970, note unc
0.1792659.7 CH3CH2OH (g) + [CH3OH]+ (g) → [CH3CH2OH]+ (g) + CH3OH (g) ΔrH°(0 K) = -0.479 ± 0.036 eVRuscic W1RO, Bodi 2012
0.1442657.8 CH3CH2OH (g) → [CH3CH2OH]+ (g) ΔrH°(0 K) = 10.407 ± 0.040 eVRuscic W1RO
0.1312752.1 [CH3CH2O]- (g) + H2O (g) → CH3CH2OH (g) + [OH]- (g) ΔrH°(0 K) = 0.502 ± 0.004 (×3.513) eVDeTuri 1999, Ervin 2002
0.1192664.6 CH3CH2OH (l) → CH3CH2OH (g) ΔrH°(298.15 K) = 42.54 ± 0.10 kJ/molFiock 1931, Rossini 1932a, Rossini 1934a, Green 1961
0.1142664.3 CH3CH2OH (l) → CH3CH2OH (g) ΔrH°(298.15 K) = 42.523 ± 0.102 kJ/molThermoData 2004
0.0982664.1 CH3CH2OH (l) → CH3CH2OH (g) ΔrH°(298.15 K) = 42.46 ± 0.11 kJ/molMajer 1985
0.0892721.7 CH3CH2OH (g) + CH2OH (g) → CH2CH2OH (g, gauche-syn) + CH3OH (g) ΔrH°(0 K) = 5.53 ± 0.50 kcal/molMatus 2007, est unc
0.0882672.7 CH3CH2OH (g) + CH2OH (g) → CH3CHOH (g, gauche-anti) + CH3OH (g) ΔrH°(0 K) = -1.15 ± 0.5 kcal/molMatus 2007, est unc
0.0782722.7 CH3CH2OH (g) + CH3 (g) → CH2CH2OH (g, gauche-syn) + CH4 (g) ΔrH°(0 K) = -2.8 ± 0.5 kcal/molMatus 2007, est unc
0.0772753.1 CH3CH2OH (g) + F- (g) → [CH3CH2O]- (g) + HF (g) ΔrH°(0 K) = 0.303 ± 0.005 (×3.668) eVDeTuri 1999, Ervin 2002
0.0762662.1 CH3CH2OH (g) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (cr,l) ΔrH°(305.65 K) = -1408.03 ± 0.40 (×1.756) kJ/molRossini 1932a, Rossini 1934a, note old units, mw conversion
0.0752664.7 CH3CH2OH (l) → CH3CH2OH (g) ΔrH°(298.15 K) = 10.15 ± 0.03 kcal/molWadso 1966a
0.0662741.1 CH3CH2OH (g) + CH3O (g) → CH3OH (g) + CH3CH2O (g, A 2A') ΔrH°(0 K) = 0.92 ± 0.50 kcal/molMatus 2007, est unc
0.0652740.6 CH3CH2OH (g) + CH3O (g) → CH3OH (g) + CH3CH2O (g, X 2A") ΔrH°(0 K) = -0.19 ± 0.50 kcal/molMatus 2007, est unc
0.0643875.6 FCH2CH2OH (g) + CH4 (g) → CH3CH2OH (g) + CH3F (g) ΔrH°(0 K) = 6.42 ± 1.0 kcal/molRuscic CBS-n
References
1 B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner, Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited. J. Phys. Chem. A 108, 9979-9997 (2004) [DOI: 10.1021/jp047912y]
2 B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner, Active Thermochemical Tables: Thermochemistry for the 21st Century. J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3 B. Ruscic and D. H. Bross, Active Thermochemical Tables (ATcT) values based on ver. 1.122 of the Thermochemical Network (2016); available at ATcT.anl.gov
4 B. Ruscic, Active Thermochemical Tables: Sequential Bond Dissociation Enthalpies of Methane, Ethane, and Methanol and the Related Thermochemistry. J. Phys. Chem. A 119, 7810-7837 (2015) [DOI: 10.1021/acs.jpca.5b01346]
5 S. J. Klippenstein, L. B. Harding, and B. Ruscic, Ab initio Computations and Active Thermochemical Tables Hand in Hand: Heats of Formation of Core Combustion Species. J. Phys. Chem. A 121, 6580-6602 (2017) [DOI: 10.1021/acs.jpca.7b05945]
6 B. Ruscic, Uncertainty Quantification in Thermochemistry, Benchmarking Electronic Structure Computations, and Active Thermochemical Tables. Int. J. Quantum Chem. 114, 1097-1101 (2014) [DOI: 10.1002/qua.24605]
Formula
The aggregate state is given in parentheses following the formula, such as: g - gas-phase, cr - crystal, l - liquid, etc.
Uncertainties
The listed uncertainties correspond to estimated 95% confidence limits, as customary in thermochemistry (see, for example, Ruscic [6]). Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.0005 kJ/mol.
Website Functionality Credits
The reorganization of the website was developed and implemented by David H. Bross (ANL). The find function is based on the complete Species Dictionary entries for the appropriate version of the ATcT TN. The molecule images are rendered by Indigo-depict. The XYZ renderings are based on Jmol: an open-source Java viewer for chemical structures in 3D. http://www.jmol.org/.
Acknowledgement
This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences under Contract No. DE-AC02-06CH11357.

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