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

This version of ATcT results was generated from an expansion of version 1.122 [4][5] to include the best possible isomerization of HCN and HNC [6].

Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass
ATcT ID
Ammonium bromide(NH4)Br (cr)[NH4+].[Br-]-253.56-270.14± 0.17kJ/mol97.9425 ±
0.0010
12124-97-9*510

Top contributors to the provenance of ΔfH° of (NH4)Br (cr)

The 20 contributors listed below account only for 59.5% of the provenance of ΔfH° of (NH4)Br (cr).
A total of 211 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
6.8800.1 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.29 ± 0.40 (×2.768) kJ/molJohnson 1963, as quoted by CODATA Key Vals
6.8800.2 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.29 ± 0.80 (×1.384) kJ/molSunner 1964, as quoted by CODATA Key Vals
5.7752.2 Br2 (cr,l) → Br2 (g) ΔrH°(298.15 K) = 7.386 ± 0.027 kcal/molHildenbrand 1958
5.2803.1 [HBr]+ (g) → H (g) Br+ (g) ΔrH°(0 K) = 31394.5 ± 20 (×2.229) cm-1Haugh 1971, Norling 1935
3.6784.1 HBr (g) → HBr (aq, 2570 H2O) ΔrH°(298.15 K) = -20.286 ± 0.012 kcal/molVanderzee 1963
3.3780.1 1/2 H2 (g) + 1/2 Br2 (cr,l) → HBr (aq) ΔrG°(298.15 K) = -102.81 ± 0.80 kJ/molJones 1934, as quoted by CODATA Key Vals
3.21199.1 NH3 (g) → NH3 (aq, undissoc) ΔrH°(298.15 K) = -8.448 ± 0.015 kcal/molVanderzee 1972
3.11210.5 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrG°(298.15 K) = -7.849 ± 0.040 kJ/molCODATA Key Vals
2.2778.1 1/2 H2 (g) + 1/2 Br2 (g) → HBr (g) ΔrH°(376.15 K) = -12.470 ± 0.170 (×1.139) kcal/molLacher 1956a, Lacher 1956
2.1771.12 HBr (g) → H (g) Br (g) ΔrH°(0 K) = 86.47 ± 0.2 kcal/molFeller 2008
2.1772.6 HBr (g) Cl (g) → HCl (g) Br (g) ΔrH°(0 K) = -15.68 ± 0.2 kcal/molFeller 2008
2.1887.1 HI (g) Br (g) → HBr (g) I (g) ΔrH°(0 K) = -16.14 ± 0.2 kcal/molFeller 2008
2.1800.3 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.55 ± 2.00 kJ/molThomsen 1882, as quoted by CODATA Key Vals
2.0891.1 Br2 (cr,l) + 3 I- (aq) → [I3]- (aq) + 2 Br- (aq) ΔrH°(298.15 K) = -29.355 ± 0.364 kcal/molWu 1963
1.73739.2 CH3CH2Br (g) → [CH3CH2]+ (g) Br (g) ΔrH°(0 K) = 11.130 ± 0.005 eVBaer 2000
1.7803.3 [HBr]+ (g) → H (g) Br+ (g) ΔrH°(0 K) = 31358 ± 15 (×5.187) cm-1Penno 1998, Norling 1935, est unc
1.61666.1 CH4 (g) Br (g) → CH3 (g) HBr (g) ΔrH°(0 K) = 5929 ± 80 cm-1Czako 2013
1.21149.1 1/2 N2 (g) + 3/2 H2 (g) → NH3 (g) ΔrH°(298.15 K) = -10.885 ± 0.010 kcal/molLarson 1923, Vanderzee 1972
1.12212.2 HCO (g) HBr (g) → H2CO (g) Br (g) ΔrG°(385 K) = 6.79 ± 0.64 (×1.756) kJ/molBecerra 1997, Nava 1981, 3rd Law, note unc
1.03872.1 COBr2 (l) H2O (cr,l) → CO2 (g) + 2 HBr (aq, 5000 H2O) ΔrH°(298.15 K) = -49.06 ± 0.32 kcal/molAnthoney 1970, as quoted by Pedley 1986

Top 10 species with enthalpies of formation correlated to the ΔfH° of (NH4)Br (cr)

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
92.3 BromideBr- (aq)[Br-]-120.80± 0.16kJ/mol79.90455 ±
0.00100
24959-67-9*800
92.3 Hydrogen bromideHBr (aq)Br-120.80± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*800
92.2 Hydrogen bromideHBr (aq, 2000 H2O)Br-120.51± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*841
92.2 Hydrogen bromideHBr (aq, 2570 H2O)Br-120.54± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*952
92.2 Hydrogen bromideHBr (aq, 3000 H2O)Br-120.56± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*842
92.2 Hydrogen bromideHBr (aq, 1000 H2O)Br-120.41± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*839
92.1 Hydrogen bromideHBr (aq, 5000 H2O)Br-120.61± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*844
92.1 Hydrogen bromideHBr (aq, 600 H2O)Br-120.32± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*834
87.9 Hydrogen bromideHBr (g)Br-27.81-35.66± 0.16kJ/mol80.9119 ±
0.0010
10035-10-6*0
87.9 Bromoniumyl[HBr]+ (g)[BrH+]1097.861090.01± 0.16kJ/mol80.9114 ±
0.0010
12258-64-9*0

Most Influential reactions involving (NH4)Br (cr)

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
0.7831210.5 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrG°(298.15 K) = -7.849 ± 0.040 kJ/molCODATA Key Vals
0.1981210.3 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrG°(298.15 K) = -1.883 ± 0.019 kcal/molShults 1966, Stephenson 1968, est unc
0.0191203.1 (NH4)Br (cr) → NH3 (g) HBr (g) ΔrH°(298.15 K) = 45.12 ± 0.13 kcal/molSmith 1914, JANAF 3, 2nd Law
0.0111203.4 (NH4)Br (cr) → NH3 (g) HBr (g) ΔrH°(298.15 K) = 45.08 ± 0.17 kcal/molSmits 1928, JANAF 3, 3rd Law
0.0061203.2 (NH4)Br (cr) → NH3 (g) HBr (g) ΔrH°(298.15 K) = 44.93 ± 0.13 (×1.756) kcal/molSmith 1914, JANAF 3, 3rd Law
0.0041210.2 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrH°(298.15 K) = 4.007 ± 0.015 (×8.175) kcal/molStephenson 1968
0.0041210.4 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrH°(298.15 K) = 4.01 ± 0.10 (×1.242) kcal/molParker 1965, as quoted by CODATA Key Vals
0.0021203.3 (NH4)Br (cr) → NH3 (g) HBr (g) ΔrH°(298.15 K) = 45.50 ± 0.17 (×2.044) kcal/molSmits 1928, JANAF 3, 2nd Law
0.0011203.7 (NH4)Br (cr) → NH3 (g) HBr (g) ΔrG°(589.4 K) = 28.72 ± 2.13 kJ/molJohnson 1909, 3rd Law
0.0001203.8 (NH4)Br (cr) → NH3 (g) HBr (g) ΔrH°(589.4 K) = 197.44 ± 7.16 (×2.43) kJ/molJohnson 1909, 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. 1.122b 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   T. L. Nguyen, J. H. Baraban, B. Ruscic, and J. F. Stanton,
On the HCN – HNC Energy Difference.
J. Phys. Chem. A 119, 10929-10934 (2015) [DOI: 10.1021/acs.jpca.5b08406]
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.