Selected ATcT [1, 2] enthalpy of formation based on version 1.122r of the Thermochemical Network [3]

This version of ATcT results was generated from an expansion of version 1.122q [4, 5] to include a non-rigid rotor anharmonic oscillator (NRRAO) partition function for hydroxymethyl [6], as well as data on 42 additional species, some of which are related to soot formation mechanisms.

Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
Ammonium nitrate(NH4)NO3 (cr,l)[NH4+].O=[N+]([O-])[O-]-350.29-365.26± 0.18kJ/mol80.04344 ±
0.00095		6484-52-2*500

Top contributors to the provenance of ΔfH° of (NH4)NO3 (cr,l)

The 9 contributors listed below account for 82.3% of the provenance of ΔfH° of (NH4)NO3 (cr,l).

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
45.51454.3 (NH4)NO3 (cr,l) → N2 (g) + 1/2 O2 (g) + 2 H2O (cr,l) ΔrH°(293.65 K) = -49.44 ± 0.06 kcal/molBecker 1934
15.21699.1 2 ONO (g) + 1/2 O2 (g) + H2O (g) → 2 HON(O)O (g) ΔrG°(371 K) = -6.04 ± 0.63 kJ/molJones 1943, 3rd Law
6.01698.1 3 ONO (g) + H2O (g) → NO (g) + 2 HON(O)O (g) ΔrH°(293.1 K) = -8.95 ± 0.24 kcal/molForsythe 1942, Chambers 1937, Wilson 1940, apud Gurvich TPIS
4.61724.1 HON(O)O (cr,l) → HON(O)O (g) ΔrH°(293.15 K) = 9.426 ± 0.030 kcal/molWilson 1940, est unc
4.31698.4 3 ONO (g) + H2O (g) → NO (g) + 2 HON(O)O (g) ΔrG°(298.15 K) = 10.33 ± 1.08 (×1.091) kJ/molChambers 1937, 3rd Law
2.11729.1 2 NO (g) + 3/2 O2 (g) + H2O (cr,l) → 2 HON(O)O (aq) ΔrH°(298.15 K) = -74.05 ± 0.5 kcal/molForsythe 1942, est unc
1.61724.4 HON(O)O (cr,l) → HON(O)O (g) ΔrH°(298.15 K) = 9.331 ± 0.05 kcal/molNBS Tables 1989, est unc
1.4120.2 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
1.31698.2 3 ONO (g) + H2O (g) → NO (g) + 2 HON(O)O (g) ΔrH°(298.15 K) = -9.184 ± 0.5 kcal/molForsythe 1942, est unc

Top 10 species with enthalpies of formation correlated to the ΔfH° of (NH4)NO3 (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 Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
94.0 Nitrate[ON(O)O]- (aq)O=[N+]([O-])[O-]-206.64± 0.18kJ/mol62.00549 ±
0.00090		14797-55-8*800
94.0 Nitric acidHON(O)O (aq)O[N+](=O)[O-]-206.64± 0.18kJ/mol63.01288 ±
0.00091		7697-37-2*800
93.6 Nitric acidHON(O)O (aq, 1000 H2O)O[N+](=O)[O-]-206.32± 0.18kJ/mol63.01288 ±
0.00091		7697-37-2*839
93.5 Nitric acidHON(O)O (aq, 3 H2O)O[N+](=O)[O-]-197.77± 0.18kJ/mol63.01288 ±
0.00091		7697-37-2*805
93.0 Nitric acidHON(O)O (aq, 1 H2O)O[N+](=O)[O-]-186.85± 0.18kJ/mol63.01288 ±
0.00091		7697-37-2*801
93.0 Nitric acidHON(O)O (cr,l)O[N+](=O)[O-]-179.02-173.30± 0.18kJ/mol63.01288 ±
0.00091		7697-37-2*500
92.6 Nitric acid monohydrate(HON(O)O)(H2O) (cr,l)O[N+](=O)[O-].O-479.18-472.68± 0.19kJ/mol81.0282 ±
0.0012		13444-82-1*500
88.1 Nitric acid trihydrate(HON(O)O)(H2O)3 (cr,l)O[N+](=O)[O-].O.O.O-1062.10-1055.25± 0.21kJ/mol117.0587 ±
0.0019		13444-83-2*500
79.4 Nitric acidHON(O)O (g)O[N+](=O)[O-]-124.50-134.21± 0.18kJ/mol63.01288 ±
0.00091		7697-37-2*0
22.1 Ammonium hydroxideNH4OH (aq, undissoc)[NH4+].[OH-]-366.712± 0.061kJ/mol35.04584 ±
0.00047		1336-21-6*1000

Most Influential reactions involving (NH4)NO3 (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
0.8971461.2 (NH4)NO3 (cr,l) → [NH4]+ (aq) + [ON(O)O]- (aq) ΔrH°(298.15 K) = 25.544 ± 0.030 kJ/molVanderzee 1980, Vanderzee 1980a, as quoted by CODATA Key Vals
0.4951454.3 (NH4)NO3 (cr,l) → N2 (g) + 1/2 O2 (g) + 2 H2O (cr,l) ΔrH°(293.65 K) = -49.44 ± 0.06 kcal/molBecker 1934
0.0531461.3 (NH4)NO3 (cr,l) → [NH4]+ (aq) + [ON(O)O]- (aq) ΔrH°(298.15 K) = 25.418 ± 0.030 (×4.088) kJ/molMedvedev 1978, as quoted by CODATA Key Vals
0.0241702.1 (NH4)NO3 (cr,l) → NH3 (g) + HON(O)O (g) ΔrG°(493 K) = 38.6 ± 0.7 kJ/molFeick 1954, 3rd Law
0.0201461.1 (NH4)NO3 (cr,l) → [NH4]+ (aq) + [ON(O)O]- (aq) ΔrH°(298.15 K) = 25.49 ± 0.20 kJ/molBecker 1934, Parker 1965, as quoted by CODATA Key Vals
0.0121730.1 HON(O)O (aq, 1000 H2O) + NH3 (g) → (NH4)NO3 (cr,l) ΔrH°(298.15 K) = -27.22 ± 0.02 (×6.169) kcal/molBecker 1934, Parker 1965
0.0081461.6 (NH4)NO3 (cr,l) → [NH4]+ (aq) + [ON(O)O]- (aq) ΔrG°(298.15 K) = -6.068 ± 0.080 (×3.914) kJ/molCODATA Key Vals
0.0051461.4 (NH4)NO3 (cr,l) → [NH4]+ (aq) + [ON(O)O]- (aq) ΔrH°(298.15 K) = 25.86 ± 0.40 kJ/molKrestov 1972, as quoted by CODATA Key Vals
0.0041461.5 (NH4)NO3 (cr,l) → [NH4]+ (aq) + [ON(O)O]- (aq) ΔrH°(298.15 K) = 6.14 ± 0.10 kcal/molParker 1965, as quoted by CODATA Key Vals
0.0021454.6 (NH4)NO3 (cr,l) → N2 (g) + 1/2 O2 (g) + 2 H2O (cr,l) ΔrH°(291.15 K) = -49.76 ± 0.90 kcal/molMedard 1953
0.0001702.3 (NH4)NO3 (cr,l) → NH3 (g) + HON(O)O (g) ΔrG°(398 K) = 64.0 ± 1.2 (×3.364) kJ/molBrandner 1962, 3rd Law
0.0001702.5 (NH4)NO3 (cr,l) → NH3 (g) + HON(O)O (g) ΔrG°(478 K) = 42.2 ± 4.3 kJ/molBrandner 1962, 3rd Law
0.0001702.4 (NH4)NO3 (cr,l) → NH3 (g) + HON(O)O (g) ΔrH°(398 K) = 179.2 ± 5.1 kJ/molBrandner 1962, 2nd Law
0.0001702.2 (NH4)NO3 (cr,l) → NH3 (g) + HON(O)O (g) ΔrH°(493 K) = 166.9 ± 6.9 kJ/molFeick 1954, 2nd Law
0.0001702.6 (NH4)NO3 (cr,l) → NH3 (g) + HON(O)O (g) ΔrH°(478 K) = 166.9 ± 10.8 kJ/molBrandner 1962, 2nd Law
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. 1.122r of the Thermochemical Network, Argonne National Laboratory, Lemont, Illinois 2021 [DOI: 10.17038/CSE/1822363]; available at ATcT.anl.gov
4   D. Feller, D. H. Bross, and B. Ruscic,
Enthalpy of Formation of C2H2O4 (Oxalic Acid) from High-Level Calculations and the Active Thermochemical Tables Approach.
J. Phys. Chem. A 123, 3481-3496 (2019) [DOI: 10.1021/acs.jpca.8b12329]
5   B. K. Welch, R. Dawes, D. H. Bross, and B. Ruscic,
An Automated Thermochemistry Protocol Based on Explicitly Correlated Coupled-Cluster Theory: The Methyl and Ethyl Peroxy Families.
J. Phys. Chem. A 123, 5673-5682 (2019) [DOI: 10.1021/acs.jpca.8b12329]
6   D. H. Bross, H.-G. Yu, L. B. Harding, and B. Ruscic,
Active Thermochemical Tables: The Partition Function of Hydroxymethyl (CH2OH) Revisited.
J. Phys. Chem. A 123, 4212-4231 (2019) [DOI: 10.1021/acs.jpca.9b02295]
7   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 [7]).
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.