ATcT [1, 2] enthalpies of formation based on version 1.122e of the Thermochemical Network [3]

Below is a list of 0 K and 298.15 K enthalpies of formation for all 1604 species included in version 1.122e (as of 09/05/2016).
This version of ATcT results was generated from an expansion of version 1.122d [4] to include chemical species related to methyl acetate and methyl formate [5].

The elements in their standard states are listed first; the listing order of the other species follows the actual order from the ATcT solution file, which roughly reflects the number of thermochemically-relevant determinations that include the species in question (highest first). The intent is to convey a very approximate indication of the robustness of the listed values, which is generally higher toward the top of the list and lower toward the bottom.

For species other than elements in their standard states, the Species Name acts as a link to the page itemizing the most important contributors to the provenance of its ATcT enthalpy of formation, other highly correlated chemical species, and high-leverage reactions in the Thermochemical Network.
(Please note that, as opposed to traditional sequential thermochemistry where the provenance of a given enthalpy of formation is typically a single measurement, the provenances of ATcT enthalpies of formation, which are obtained by analysing and solving a large Thermochemical Network, are normally quite distributed.)

If you find Active Thermochemical Tables useful in your research, please cite this website as given in Ref. [3], and, if possible, the ATcT approach as given in Refs. [1] and [2].



          
          
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The reaction search accepts only the preferred formula, as specified in this version of the Thermochemical Network.
For help finding the current preferred formula of a species, please refer to the species name or species formula searches above.
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The stoichiometry represents fractions as decimals,
e.g. 0.5 O2, 1 H2, 1 H2O would represent
1/2 O2 + H2 → H2O

Reactant Reactant Reactant Reactant Reactant Reactant Reactant Reactant
Product Product Product Product Product Product Product Product


Species Name Preferred Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass
ATcT ID
Dihydrogen [H][H]00exact2.01588 ±
0.00014
1333-74-0*0
Helium [He]00exact4.0026020 ±
0.0000020
7440-59-7*0
Carbon atom [C]00exact12.01070 ±
0.00080
7440-44-0*500
Dinitrogen N#N00exact28.01348 ±
0.00014
7727-37-9*0
Dioxygen O=O00exact31.99880 ±
0.00060
7782-44-7*0
Difluorine FF00exact37.9968064 ±
0.0000010
7782-41-4*0
Neon [Ne]00exact20.17970 ±
0.00060
7440-01-9*0
Dichlorine ClCl00exact70.9054 ±
0.0018
7782-50-5*0
Argon [Ar]00exact39.94800 ±
0.00100
7440-37-1*0
Dibromine BrBr00exact159.8080 ±
0.0020
7726-95-6*500
Krypton [Kr]00exact83.8000 ±
0.1000
7439-90-9*0
Diiodine II00exact253.808940 ±
0.000060
7553-56-2*500
Xenon [Xe]00exact131.2900 ±
0.0200
7440-63-3*0
Deuterium molecule [2H][2H]00exact4.02820355600 ±
0.00000000080
7782-39-0*0
Hydrogen atom [H]216.034217.998± 0.000kJ/mol1.007940 ±
0.000070
12385-13-6*0
Carbon atom [C]711.401716.886± 0.048kJ/mol12.01070 ±
0.00080
7440-44-0*0
Oxygen atom [O]246.844249.229± 0.0021kJ/mol15.99940 ±
0.00030
17778-80-2*0
Nitrogen atom [N]470.579472.442± 0.024kJ/mol14.006740 ±
0.000070
17778-88-0*0
Carbon dioxide C(=O)=O-393.108-393.474± 0.015kJ/mol44.00950 ±
0.00100
124-38-9*0
Chlorine atom [Cl]119.621121.302± 0.0011kJ/mol35.45270 ±
0.00090
22537-15-1*0
Fluorine atom [F]77.25579.361± 0.048kJ/mol18.99840320 ±
0.00000050
14762-94-8*0
Methane C-66.557-74.526± 0.056kJ/mol16.04246 ±
0.00085
74-82-8*0
Water O-286.301-285.829± 0.027kJ/mol18.01528 ±
0.00033
7732-18-5*500
Ethane CC-68.34-83.97± 0.13kJ/mol30.0690 ±
0.0017
74-84-0*0
Water O-238.931-241.835± 0.027kJ/mol18.01528 ±
0.00033
7732-18-5*0
Hydron [H+]1528.0841530.047± 0.000kJ/mol1.007391 ±
0.000070
12408-02-5*0
Ethylene C=C60.8852.36± 0.12kJ/mol28.0532 ±
0.0016
74-85-1*0
Bromine atom [Br]117.914111.851± 0.056kJ/mol79.90400 ±
0.00100
10097-32-2*0
Methanol CO-190.06-200.95± 0.16kJ/mol32.04186 ±
0.00090
67-56-1*0
Hydrogen chloride Cl-91.989-92.173± 0.0062kJ/mol36.46064 ±
0.00090
7647-01-0*0
Hydroxyl [OH]37.24937.489± 0.027kJ/mol17.00734 ±
0.00031
3352-57-6*0
Carbon monoxide [C-]#[O+]-113.803-110.523± 0.026kJ/mol28.01010 ±
0.00085
630-08-0*0
Methyl [CH3]149.860146.446± 0.075kJ/mol15.03452 ±
0.00083
2229-07-4*0
Formaldehyde C=O-105.382-109.221± 0.098kJ/mol30.02598 ±
0.00087
50-00-0*0
Propane CCC-82.73-105.01± 0.18kJ/mol44.0956 ±
0.0025
74-98-6*0
Hydrogen fluoride F-272.677-272.724± 0.049kJ/mol20.006343 ±
0.000070
7664-39-3*0
Hydrogen bromide Br-27.98-35.83± 0.15kJ/mol80.9119 ±
0.0010
10035-10-6*0
Iodine atom [I]107.157106.757± 0.0021kJ/mol126.904470 ±
0.000030
14362-44-8*0
Ethyl C[CH2]131.05119.99± 0.27kJ/mol29.0611 ±
0.0016
2025-56-1*0
Ethanol CCO-217.25-234.97± 0.22kJ/mol46.0684 ±
0.0017
64-17-5*0
Acetylene C#C228.82228.26± 0.13kJ/mol26.0373 ±
0.0016
74-86-2*0
Nitric oxide [N]=O90.61991.123± 0.065kJ/mol30.00614 ±
0.00031
10102-43-9*0
Chloromethane CCl-74.66-82.60± 0.20kJ/mol50.4872 ±
0.0012
74-87-3*0
Hydrogen cyanide C#N129.661129.277± 0.090kJ/mol27.02538 ±
0.00081
74-90-8*0
Ammonia N-38.565-45.557± 0.030kJ/mol17.03056 ±
0.00022
7664-41-7*0
Propene CC=C34.9419.94± 0.21kJ/mol42.0797 ±
0.0024
115-07-1*0
Nitrogen dioxide O=[N]=O36.85934.052± 0.065kJ/mol46.00554 ±
0.00060
10102-44-0*0
Hydroxyde [OH-]-139.092-139.059± 0.027kJ/mol17.00789 ±
0.00031
14280-30-9*0
Dioxidanyl O[O]15.1312.22± 0.15kJ/mol33.00674 ±
0.00060
3170-83-0*0
Hydrogen iodide I28.64526.469± 0.036kJ/mol127.912410 ±
0.000076
10034-85-2*0
Fluoromethane CF-227.45-235.48± 0.24kJ/mol34.03292 ±
0.00083
593-53-3*0
Acetaldehyde CC=O-155.14-165.61± 0.26kJ/mol44.0526 ±
0.0017
75-07-0*0
Hydrogen peroxide OO-129.478-135.464± 0.063kJ/mol34.01468 ±
0.00062
7722-84-1*0
Bromomethane CBr-20.94-36.34± 0.18kJ/mol94.9385 ±
0.0013
74-83-9*0
n-Butane CCCC-98.46-125.77± 0.26kJ/mol58.1222 ±
0.0033
106-97-8*0
Benzene c1ccccc1100.6283.11± 0.23kJ/mol78.1118 ±
0.0048
71-43-2*0
Methylene [CH2]428.72429.14± 0.11kJ/mol14.02658 ±
0.00081
2465-56-7*2
Hypochlorous acid OCl-73.868-76.808± 0.028kJ/mol52.46004 ±
0.00095
7790-92-3*0
Propyne CC#C192.79185.74± 0.24kJ/mol40.0639 ±
0.0024
74-99-7*0
Dibromine BrBr45.6730.88± 0.11kJ/mol159.8080 ±
0.0020
7726-95-6*0
Methylene [CH2]391.063391.621± 0.099kJ/mol14.02658 ±
0.00081
2465-56-7*1
Formic acid C(=O)O-371.08-378.40± 0.22kJ/mol46.0254 ±
0.0010
64-18-6*1
Fluoride [F-]-250.909-249.125± 0.048kJ/mol18.99895178 ±
0.00000050
16984-48-8*0
Diiodine II65.49762.417± 0.0041kJ/mol253.808940 ±
0.000060
7553-56-2*0
Ketene C=C=O-45.35-48.46± 0.12kJ/mol42.0367 ±
0.0016
463-51-4*0
Tetrachloromethane C(Cl)(Cl)(Cl)Cl-93.48-95.65± 0.44kJ/mol153.8215 ±
0.0037
56-23-5*0
Chloroethane CCCl-96.89-111.48± 0.26kJ/mol64.5138 ±
0.0019
75-00-3*0
Tetrafluoromethane C(F)(F)(F)F-927.45-933.42± 0.25kJ/mol88.00431 ±
0.00080
75-73-0*0
Methylidyne [CH]592.824596.159± 0.099kJ/mol13.01864 ±
0.00080
3315-37-5*0
Toluene c1ccc(cc1)C73.3050.01± 0.34kJ/mol92.1384 ±
0.0056
108-88-3*0
Fluoroform C(F)(F)F-688.93-695.88± 0.43kJ/mol70.01385 ±
0.00080
75-46-7*0
Ozone O=[O+][O-]144.397141.734± 0.039