The ordered listing of the chemical compounds in Table A2 is the same as that in the JANAF tables and is alphabetical according to the chemical formula with the lowest order letter in the formula determining the position. The thermochemical tables have the following order.

The reader should refer to the original tables for the reference material on which the thermochemical data are based. The reference state used in Chapter 1 was chosen as 298 K; consequently, the thermochemical values at this temperature are identified from this listing. The logarithm of the equilibrium constant is to the base 10. The units notation (J/K/mol) is equivalent to (J K⁻¹ mol⁻¹). Supplemental thermochemical data for species included in the reaction listing of Appendix C, and not given in Table A2, are listed in Table A3. These data, in combination with those of Table A2, may be used to calculate heats of reaction and reverse reaction rate constants as described in Chapter 2. References for the thermochemical data cited in Table A3 may be found in the respective references for the chemical mechanisms of Appendix C.

Detailed data on the higher−order hydrocarbons are not presented. Such data are obtained readily from NBS Circular C 461, “Selected Values of Properties of Hydrocarbons,” 1947, from the work of Stull, D.R., Westrum, E.F., Jr., and Sinke, G.C., “The Chemical Thermodynamics of Organic Compounds,” Wiley, New York, 1969, and from Reid, R.C., Prausnitz, J.M, and Poling, B.E., “The Properties of Gases and Liquids,” McGraw Hill, New York, 1987.

Burcat [“Thermochemical Data for Combustion Calculations” in Combustion Chemistry, W.C. Gardiner, Jr., Ed., Chapter 8, Wiley, New York, 1984] discusses in detail the various sources of thermochemical data and their adaptation for computer usage. Examples of thermochemical data fit to polynomials for use in computer calculations are reported by McBride, B.J., Gordon, S., and Reno, M.A., “Coefficients for Calculating Thermodynamic and Transport Properties of Individual Species,” NASA Technical Memorandum 4513, NASA, NASA Langley, VA, 1993, and by Kee, R.J., Rupley, F.M., and Miller, J.A., “The Chemkin Thermodynamic Data Base,” Sandia Technical Report SAND87−8215B, Sandia National Laboratories, Livermore, CA 9455, 1987.

Thermochemical data are also available from the Internet. Some examples are the NIST–JANAF Thermochemical Tables (http://kinetics.nist.gov/janaf/), the Third Millennium Ideal Gas and Condensed Phase Thermochemical Database for Combustion (A. Burcat and B. Ruscic), http://burcat.technion.ac.il/dir/, http://garfield.chem.elte.hu/Burcat/burcat.html) and the Sandia National Laboratory high−temperature thermodynamic database, http://www.ca.sandia.gov/HiTempThermo/.