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Section: 5 | CODATA Key Values for Thermodynamics |
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The table 'CODATA Key Values for Thermodynamics' has one or more different columns to those in the book version.
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The recommended form of citation is:
John R. Rumble, ed., CRC Handbook of Chemistry and Physics, 102nd Edition (Internet Version 2021), CRC Press/Taylor & Francis, Boca Raton, FL.
If a specific table is cited, use the format: "Physical Constants of Organic Compounds," in CRC Handbook of Chemistry and Physics, 102nd Edition (Internet Version 2021), John R. Rumble, ed., CRC Press/Taylor & Francis, Boca Raton, FL.

CODATA KEY VALUES FOR THERMODYNAMICS 

The Committee on Data for Science and Technology (CODATA) conducted a project to establish internationally agreed values for the thermodynamic properties of key chemical substances. This table presents the final results of the project. Use of these recommended, internally consistent values is encouraged in the analysis of thermodynamic measurements, data reduction, and preparation of other thermodynamic tables.

The table includes the standard enthalpy of formation at 298.15 K, the entropy at 298.15 K, and the quantity H°(298.15 K)–H°(0). A value of 0 in the ∆fH° column for an element indicates the reference state for that element. The standard state pressure is 100,000 Pa (1 bar). See the reference for information on the dependence of gas-phase entropy on the choice of standard state pressure.

 Column definitions are as follows.

Column heading Definition
Name Chemical substance name (Online Edition only)
Mol. form. Molecular formula; substances are listed in alphabetical order of their chemical formulas when written in the most common form
Phys. state Physical state; g = gas; cr = crystalline; aq = aqueous; l = liquid; for some physical states, the crystal system or other information is also given
ΔfHº(298) Standard enthalpy of formation at 298.15 K
Sº(298) Entropy at 298.15 K
Hº(298)-Hº(0) Enthalpy difference between 298.15 K and 0 K

The table is reprinted with permission of CODATA.

Reference

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CODATA Key Values for Thermodynamics



Mol. form.SynonymPhys. stateCAS Reg. No.Mol. wt.ΔfHº(298)/
kJ mol-1		Sº(298)/
J mol-1 K-1		Hº(298)-Hº(0)/
kJ mol-1
Continued on next page...
AgSilvercr7440-22-4107.868042.55 ± 0.205.745 ± 0.020
AgSilverg7440-22-4107.868284.9 ± 0.8172.997 ± 0.0046.197 ± 0.001
Ag+Silver ion [Ag+]aq14701-21-4107.868105.79 ± 0.0873.45 ± 0.40
AgClSilver(I) chlorideCerargyritecr7783-90-6143.321-127.01 ± 0.0596.25 ± 0.2012.033 ± 0.020
AlAluminumcr7429-90-526.982028.30 ± 0.104.540 ± 0.020
AlAluminumg7429-90-526.982330.0 ± 4.0164.554 ± 0.0046.919 ± 0.001
Al+3Aluminum ion [Al+3]aq22537-23-126.982-538.4 ± 1.5-325 ± 10
AlF3Aluminum fluorideAluminum trifluoridecr7784-18-183.977-1510.4 ± 1.366.5 ± 0.511.62 ± 0.04
Al2O3Aluminum oxide (α)Corundumcr, corundum1344-28-1101.961-1675.7 ± 1.350.92 ± 0.1010.016 ± 0.020
ArArgong7440-37-139.9480154.846 ± 0.0036.197 ± 0.001
BBoroncr, rhombic7440-42-810.8105.90 ± 0.081.222 ± 0.008
BBorong7440-42-810.81565 ± 5153.436 ± 0.0156.316 ± 0.002
BF3Boron trifluorideTrifluoroboraneg7637-07-267.806-1136.0 ± 0.8254.42 ± 0.2011.650 ± 0.020
B2O3Boron oxideBoric oxidecr1303-86-269.620-1273.5 ± 1.453.97 ± 0.309.301 ± 0.040
BeBerylliumGluciniumcr7440-41-79.01209.50 ± 0.081.950 ± 0.020
BeBerylliumGluciniumg7440-41-79.012324 ± 5136.275 ± 0.0036.197 ± 0.001
BeOBeryllium oxideBerylliacr1304-56-925.011-609.4 ± 2.513.77 ± 0.042.837 ± 0.008
Br-Bromide ion [Br-]aq24959-67-979.904-121.41 ± 0.1582.55 ± 0.20
BrBromine (atomic)g10097-32-279.904111.87 ± 0.12175.018 ± 0.0046.197 ± 0.001


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