Selected ATcT [1, 2] enthalpy of formation based on version 1.172 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.156 to include species relevant to a study of photodissociation of formamide[4].

Carbon dioxide

Formula: CO2 (aq, undissoc)

CAS RN: 124-38-9

ATcT ID: 124-38-9*1000

SMILES: C(=O)=O

InChI: InChI=1S/CO2/c2-1-3

InChIKey: CURLTUGMZLYLDI-UHFFFAOYSA-N

Hills Formula: C1O2

2D Image:

Aliases: Carbon dioxide; Methanedione; Carbonic anhydride; Carbonic acid anhydride; Carbon oxide; R744; CO2; OCO; O=C=O; UN 1013; UN 1845; UN 2187

Relative Molecular Mass: 44.00950 ± 0.00100

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
	-412.868	± 0.018	kJ/mol

Top contributors to the provenance of Δ_fH° of CO2 (aq, undissoc)

The 10 contributors listed below account for 90.5% of the provenance of Δ_fH° of CO2 (aq, undissoc).

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 (%)	TN ID	Reaction	Measured Quantity	Reference
25.8	3217.14	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 2.008 ± 0.003 kcal/mol	Berg 1978a
22.1	2228.7	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.464 ± 0.024 kJ/mol	Hawtin 1966, note CO2e
8.8	2228.4	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.462 ± 0.038 kJ/mol	Lewis 1965, note CO2d
8.8	2228.5	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.468 ± 0.038 kJ/mol	Fraser 1952, note CO2f
6.4	3217.12	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 2.009 ± 0.006 kcal/mol	Hu 1972a, Berg 1978a, est unc
6.0	2228.11	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -94.051 ± 0.011 kcal/mol	Prosen 1944a, Cox 1970, NBS TN270, NBS Tables 1989
4.0	2228.6	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.462 ± 0.056 kJ/mol	Hawtin 1966, note CO2e
3.3	2228.2	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.498 ± 0.062 kJ/mol	Dewey 1938, note CO2, Rossini 1938, note CO2c
3.1	2228.3	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(303.15 K) = -393.447 ± 0.064 kJ/mol	Jessup 1938, note CO2a, Rossini 1938, note CO2c
1.8	2228.1	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.560 ± 0.055 (×1.509) kJ/mol	Prosen 1944, note CO2b

Top 10 species with enthalpies of formation correlated to the Δ_fH° of CO2 (aq, undissoc)

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	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
79.9	Carbon dioxide	CO2 (g)	-393.111	-393.478	± 0.015	kJ/mol	44.00950 ± 0.00100	124-38-9*0
79.0	Carbon dioxide cation	[CO2]+ (g)	936.089	936.924	± 0.017	kJ/mol	44.00895 ± 0.00100	12181-61-2*0
60.0	Carbonic acid	C(O)(OH)2 (aq, undissoc)		-698.673	± 0.028	kJ/mol	62.0248 ± 0.0012	463-79-6*1000
46.6	Benzoic acid	C6H5C(O)OH (cr,l)	-367.34	-384.75	± 0.17	kJ/mol	122.1213 ± 0.0056	65-85-0*500
40.2	Benzoic acid	C6H5C(O)OH (g)	-274.35	-294.14	± 0.19	kJ/mol	122.1213 ± 0.0056	65-85-0*0
35.6	Succinic acid	(CH2C(O)OH)2 (cr,l)	-918.50	-940.23	± 0.12	kJ/mol	118.0880 ± 0.0034	110-15-6*500
30.7	Benzene	C6H6 (cr,l)	50.77	49.23	± 0.21	kJ/mol	78.1118 ± 0.0048	71-43-2*500
30.7	Benzene	C6H6 (g)	100.68	83.17	± 0.21	kJ/mol	78.1118 ± 0.0048	71-43-2*0
30.7	Benzene cation	[C6H6]+ (g)	992.57	976.11	± 0.21	kJ/mol	78.1113 ± 0.0048	34504-50-2*0
29.4	Benzoyl chloride	C6H5C(O)Cl (cr,l)		-157.11	± 0.26	kJ/mol	140.5667 ± 0.0057	98-88-4*500

Most Influential reactions involving CO2 (aq, undissoc)

Please note: The list, which is based on a hat (projection) matrix analysis, is limited to no more than 20 largest influences.

Influence Coefficient	TN ID	Reaction	Measured Quantity	Reference
1.000	3216.1	CO2 (aq, undissoc) + H2O (cr,l) → C(O)(OH)2 (aq, undissoc)	Δ_rH°(298.15 K) = 0 ± 0 cm-1	triv
0.716	3217.14	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 2.008 ± 0.003 kcal/mol	Berg 1978a
0.179	3217.12	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 2.009 ± 0.006 kcal/mol	Hu 1972a, Berg 1978a, est unc
0.045	3217.3	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 8.363 ± 0.05 kJ/mol	Carroll 1991, est unc
0.045	3217.1	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 8.381 ± 0.05 kJ/mol	Scharlin 1996, Carroll 1991, est unc
0.005	3217.4	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -19.426 ± 0.15 kJ/mol	Carroll 1991, est unc
0.005	3217.2	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -19.342 ± 0.15 kJ/mol	Scharlin 1996, Carroll 1991, est unc
0.000	3217.13	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -4.717 ± 0.040 (×2.089) kcal/mol	Berg 1978a
0.000	3217.5	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -4.720 ± 0.050 (×1.719) kcal/mol	Hu 1972a, Berg 1978a, est unc
0.000	3217.6	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -4.720 ± 0.040 (×2.181) kcal/mol	Berg 1978a, CODATA Key Vals
0.000	3217.7	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -19.67 ± 0.40 kJ/mol	Gill 1982, Carroll 1991, est unc
0.000	3217.8	CO2 (g) → CO2 (aq, undissoc)	Δ_rG°(298.15 K) = 8.38 ± 0.40 kJ/mol	NBS Tables 1989
0.000	3217.9	CO2 (g) → CO2 (aq, undissoc)	Δ_rH°(298.15 K) = -20.29 ± 0.40 (×2.278) kJ/mol	NBS Tables 1989

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 21^st 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. 1.172 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		K. L. Caster, N. A. Seifert, B. Ruscic, A. W. Jasper, and K. Prozument, Dynamics of HCN, NHC, and HNCO Formation in the 193 nm Photodissociation of Formamide J. Phys. Chem. A (in press) (2024) [DOI: 10.1021/acs.jpca.4c02232]
5		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]
6		B. Ruscic and D. H. Bross, Thermochemistry Computer Aided Chem. Eng. 45, 3-114 (2019) [DOI: 10.1016/B978-0-444-64087-1.00001-2]

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 [5] and Ruscic and Bross[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.