Selected ATcT [1, 2] enthalpy of formation based on version 1.176 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.172 to include species related to Criegee intermediates that are involved in several ongoing studies[4].

Hydrogen peroxide

Formula: HOOH (cr,l)

CAS RN: 7722-84-1

ATcT ID: 7722-84-1*500

SMILES: OO

InChI: InChI=1S/H2O2/c1-2/h1-2H

InChIKey: MHAJPDPJQMAIIY-UHFFFAOYSA-N

Hills Formula: H2O2

2D Image:

Aliases: Hydrogen peroxide; Dioxidane; Dihydrogen peroxide; Hydrogen dioxide; Dihydrogen dioxide; Albone; Oxydol; Perhydrol; Superoxol; HOOH; H2O2

Relative Molecular Mass: 34.01468 ± 0.00062

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-193.114	-187.297	± 0.076	kJ/mol

Top contributors to the provenance of Δ_fH° of HOOH (cr,l)

The 20 contributors listed below account only for 84.5% of the provenance of Δ_fH° of HOOH (cr,l).
A total of 42 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 (%)	TN ID	Reaction	Measured Quantity	Reference
24.7	241.9	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.925 ± 0.073 kJ/mol	Scatchard 1952, 3rd Law, apud Gurvich TPIS
17.3	244.1	HOOH (g) → 2 OH (g)	Δ_rH°(0 K) = 17051.8 ± 3.4 cm-1	Luo 1992
7.9	125.2	1/2 O2 (g) + H2 (g) → H2O (cr,l)	Δ_rH°(298.15 K) = -285.8261 ± 0.040 kJ/mol	Rossini 1939, Rossini 1931, Rossini 1931b, note H2Oa, Rossini 1930
5.8	241.4	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.92 ± 0.15 kJ/mol	Maass 1924, 3rd Law, apud Gurvich TPIS
5.5	240.3	HOOH (cr,l) → H2O (cr,l) + 1/2 O2 (g)	Δ_rH°(293.15 K) = -23.48 ± 0.03 (×2.181) kcal/mol	Roth 1930, est unc
5.1	241.7	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.75 ± 0.16 kJ/mol	Egerton 1951, 3rd Law, apud Gurvich TPIS
4.2	240.4	HOOH (cr,l) → H2O (cr,l) + 1/2 O2 (g)	Δ_rH°(293.15 K) = -23.47 ± 0.02 (×3.748) kcal/mol	Matheson 1929, est unc
2.3	2373.7	CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (cr,l)	Δ_rH°(298.15 K) = -890.578 ± 0.078 kJ/mol	Schley 2010
2.2	240.1	HOOH (cr,l) → H2O (cr,l) + 1/2 O2 (g)	Δ_rH°(300.05 K) = -23.44 ± 0.02 (×5.187) kcal/mol	Giguere 1955
2.1	2375.1	2 H2 (g) + C (graphite) → CH4 (g)	Δ_rG°(1165 K) = 37.521 ± 0.068 kJ/mol	Smith 1946, note COf, 3rd Law
0.7	241.1	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.47 ± 0.40 (×1.044) kJ/mol	NBS Tables 1989
0.7	242.3	HOOH (cr,l) → HOOH (g)	Δ_rH°(273.15 K) = 12.616 ± 0.1 kcal/mol	Giguere 1962, est unc
0.7	242.4	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 12.337 ± 0.1 kcal/mol	Giguere 1962, est unc
0.7	242.5	HOOH (cr,l) → HOOH (g)	Δ_rH°(318.15 K) = 12.119 ± 0.1 kcal/mol	Giguere 1962, est unc
0.7	242.6	HOOH (cr,l) → HOOH (g)	Δ_rH°(333.15 K) = 11.949 ± 0.1 kcal/mol	Giguere 1962, est unc
0.7	242.1	HOOH (cr,l) → HOOH (g)	Δ_rH°(300.05 K) = 12.315 ± 0.1 kcal/mol	Giguere 1955, note H2O2c
0.7	242.2	HOOH (cr,l) → HOOH (g)	Δ_rH°(273.15 K) = 12.59 ± 0.1 kcal/mol	Foley 1951, note H2O2b
0.5	115.11	H2O (g) → O (g) + 2 H (g)	Δ_rH°(0 K) = 917.80 ± 0.15 kJ/mol	Thorpe 2021
0.5	157.1	OH (g) → [OH]+ (g)	Δ_rH°(0 K) = 104989 ± 5 (×2.378) cm-1	Wiedmann 1992, note unc
0.4	225.4	HOOH (g) → 2 H (g) + 2 O (g)	Δ_rH°(0 K) = 1054.84 ± 0.56 kJ/mol	Harding 2008

Top 10 species with enthalpies of formation correlated to the Δ_fH° of HOOH (cr,l)

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
69.9	Hydrogen peroxide	HOOH (g)	-129.426	-135.412	± 0.057	kJ/mol	34.01468 ± 0.00062	7722-84-1*0
69.9	Hydrogen peroxide	HOOH (g, para)	-129.426	-135.412	± 0.057	kJ/mol	34.01468 ± 0.00062	7722-84-1*2
69.9	Hydrogen peroxide	HOOH (g, ortho)	-129.406	-135.412	± 0.057	kJ/mol	34.01468 ± 0.00062	7722-84-1*1
52.0	Hydroxyl	OH (g)	37.274	37.514	± 0.022	kJ/mol	17.00734 ± 0.00031	3352-57-6*0
52.0	Hydroxyde	[OH]- (g)	-139.068	-139.034	± 0.022	kJ/mol	17.00789 ± 0.00031	14280-30-9*0
51.9	Water	H2O (g, ortho)	-238.622	-241.810	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*1
51.9	Water	H2O (g, para)	-238.907	-241.810	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*2
51.9	Water	H2O (g)	-238.907	-241.810	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*0
51.9	Water	H2O (l, eq.press.)		-285.806	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*589
51.9	Water	H2O (l)		-285.804	± 0.022	kJ/mol	18.01528 ± 0.00033	7732-18-5*590

Most Influential reactions involving HOOH (cr,l)

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
0.554	241.9	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.925 ± 0.073 kJ/mol	Scatchard 1952, 3rd Law, apud Gurvich TPIS
0.343	243.3	HOOH (cr,l) → HOOH (aq)	Δ_rG°(298.15 K) = -13.68 ± 0.40 kJ/mol	NBS Tables 1989
0.343	243.2	HOOH (cr,l) → HOOH (aq)	Δ_rH°(298.15 K) = -3.39 ± 0.40 kJ/mol	NBS Tables 1989
0.313	243.1	HOOH (cr,l) → HOOH (aq)	Δ_rH°(298.15 K) = -0.819 ± 0.100 kcal/mol	Giguere 1955, est unc
0.131	241.4	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.92 ± 0.15 kJ/mol	Maass 1924, 3rd Law, apud Gurvich TPIS
0.115	241.7	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.75 ± 0.16 kJ/mol	Egerton 1951, 3rd Law, apud Gurvich TPIS
0.060	240.3	HOOH (cr,l) → H2O (cr,l) + 1/2 O2 (g)	Δ_rH°(293.15 K) = -23.48 ± 0.03 (×2.181) kcal/mol	Roth 1930, est unc
0.046	240.4	HOOH (cr,l) → H2O (cr,l) + 1/2 O2 (g)	Δ_rH°(293.15 K) = -23.47 ± 0.02 (×3.748) kcal/mol	Matheson 1929, est unc
0.024	240.1	HOOH (cr,l) → H2O (cr,l) + 1/2 O2 (g)	Δ_rH°(300.05 K) = -23.44 ± 0.02 (×5.187) kcal/mol	Giguere 1955
0.016	241.1	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 51.47 ± 0.40 (×1.044) kJ/mol	NBS Tables 1989
0.016	242.4	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 12.337 ± 0.1 kcal/mol	Giguere 1962, est unc
0.016	242.2	HOOH (cr,l) → HOOH (g)	Δ_rH°(273.15 K) = 12.59 ± 0.1 kcal/mol	Foley 1951, note H2O2b
0.016	242.3	HOOH (cr,l) → HOOH (g)	Δ_rH°(273.15 K) = 12.616 ± 0.1 kcal/mol	Giguere 1962, est unc
0.016	242.1	HOOH (cr,l) → HOOH (g)	Δ_rH°(300.05 K) = 12.315 ± 0.1 kcal/mol	Giguere 1955, note H2O2c
0.016	242.6	HOOH (cr,l) → HOOH (g)	Δ_rH°(333.15 K) = 11.949 ± 0.1 kcal/mol	Giguere 1962, est unc
0.016	242.5	HOOH (cr,l) → HOOH (g)	Δ_rH°(318.15 K) = 12.119 ± 0.1 kcal/mol	Giguere 1962, est unc
0.000	241.6	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 47.51 ± 3.1 (×1.414) kJ/mol	Egerton 1951, 2nd Law, apud Gurvich TPIS
0.000	241.3	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 47.95 ± 4.4 kJ/mol	Maass 1924, 2nd Law, apud Gurvich TPIS
0.000	241.8	HOOH (cr,l) → HOOH (g)	Δ_rH°(298.15 K) = 52.2 ± 10 kJ/mol	Scatchard 1952, 2nd Law, apud Gurvich TPIS

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. 1.176 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		T. L. Nguyen et al, ongoing studies (2024)
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.