In thermodynamics, a free energy table or thermodynamic table is a set of calculated data for values of free energy, enthalpy, and entropy of various chemical species that is used to determine reaction feasibility among other information. An example of a basic free energy table for various organic species is shown adjacent. [1]

History
The precursor to the free energy tables were the various "affinity tables", the first of which was constructed in 1718 by French physician and chemist Étienne Geoffroy during a translation into French of English physicist Isaac Newton's Opticks. [2] After numerous constructions of larger and larger affinity tables, it soon became apparent, in circa 1790s, that each affinity reactions depend on temperature, and that each table would need to be constructed anew for each different temperature. To remedy this issue, beginning in the 1880s affinity A began to be interpreted in terms of free energy changes, i.e. replaced by separate measurements of enthalpy H and entropy S, according to the following formulas:

A = – ΔG

or

A = TΔS – ΔH

The first systematic study of all the thermodynamic data necessary for the calculation of the free energy of chemical substances in a group of important reactions was done by German chemist Fritz Haber as presented in his 1905 work Thermodynamics of Technical Gas Reactions. [5]

The first thermodynamic table for biochemical species, containing about 100 species, were the 1957 appendix of tables by English electrical engineer and physicist Keith Burton in Krebs and Kornberg's Energy Transformations in Living Matter. [3]

Human thermodynamics
The future goal of human chemical thermodynamics, will be to calculate human free energy tables for the calculation of reaction feasibilities and spontaneities of different combinations of human chemical species (human molecules); as in different sets of potentials in the process of "love the chemical reaction." [4] The affinity-based beta-stage online pair-matching site ReactionMatch.com has this goal in mind.

References
1. Chang, Raymond. (1998). Chemistry, 6th ed. (Appendix 3). New York: McGraw-Hill.
2. Kim, Mi G. (2003). Affinity , That Elusive Dream - a Genealogy of the Chemical Revolution. Cambridge, Mass.: MIT Press.
3. (a) Krebs, H.A. and Kornberg, H.L. (1957). Energy Transformations in Living Matter (with an Appendix by K. Burton with 21 figures). Berlin: Springer-Verlag.
(b) Alberty, Robert, A. (2003). Thermodynamic of Biochemical Reactions, (pg. 2). Hoboken, New Jersey: John Wiley & Sons, Inc.
4. Thims, Libb. (2007). Human Chemistry (Volume One), (preview). (ch. 11: "Affinity and Free Energy", section: Human affinity - Gibbs free energy - tables, pgs. 464-68). Morrisville, NC: LuLu.
5. Lewis, Gilbert N. and Randall, Merle. (1923). Thermodynamics and the Free Energy of Chemical Substances, (pgs. 5-6). McGraw-Hill Book Co., Inc.