Chemical Thermodynamic Data

The Internet has become the best source for thermodynamic data. Run a search on something like chemical thermodynamic data on any serious search engine, and you will hnd multiple sources, most of which allow free downloads. The data in the standard handbooks, e.g. Perry s Handbook (see Suggestions for Further Reading section of Chapter 5), are still correct but rather capricious in scope and likely to be expressed in archaic units like those sprinkled here and there in this book. 

Wormald, C.J., "Thermodynamic Properties of Some Mixtures Containing Steam." Paper presented at National Physical Laboratory Conference on Chemical Thermodynamic Data on Fluids and Fluid Mixtures, Tedding ton, Middlesex, U.K., September 11-12, 1978. Conference Proceedings published by IPC Science and Technology Press. 

References (20, 22, 23, 24, 29, and 74) comprise the series of Technical Notes 270 from the Chemical Thermodynamics Data Center at the National Bureau of Standards. These give selected values of enthalpies and Gibbs energies of formation and of entropies and heat capacities of pure compounds and of aqueous species in their standard states at 25 °C. They include all inorganic compounds of one and two carbon atoms per molecule. 

The letter F previously has been associated with the Gibbs function, particularly in the United States. Some older tabulations of chemical thermodynamic data use F for the function of Equation (7.17). The term free energy is most commonly assigned to G, but we have adopted the name Gibbs function to be consistent with Helmholtz function for A and Planck function for Y. 

Development and application of the Nagra/PSI Chemical Thermodynamic Data Base 01 /01... 

Hummel, W., Berner, U., Curti, E., Pearson, F. J. Thoenen, T. 2002. Nagra/PSl Chemical Thermodynamic Data Base 01/01. Nagra Technical Report NTB 02-16, Nagra, Wettingen, Switzerland. Also published by Universal Publishers/ uPublish.com Parkland, Florida, USA. World Wide Web Address http //www.upublish.com. 

Thoenen, T. Kulik, D. 2003. Nagra/PSI Chemical Thermodynamic Data Base 01/01 for the GEM-Selektor (V.2-PSI) Geochemical Modeling Code Release 28-02-03. PSI Technical Report TM-44-03-04, Paul Scherrer Institut, Villigen, Switzerland. 

Ambrose, D., The Correlation and Estimation of Vapor Pressures, in Proceedings NPL Conference Chemical Thermodynamic Data on Fluids and Fluid Mixtures, September 1978, Guildford UK, p. 193, IPC Science Technology Press, 1979. 

This chapter presents the chemical thermodynamic data set for selenium species which has been selected in this review. Table lll-l contains the reeommended thermodynamic data of the selenium species, Table III-2 the recommended thermodynamic data of chemical equilibrium reactions by which the selenium compounds and complexes are formed, and Table III-3 the temperature coefficients of the heat capacity data of Table lll-lwhere available (see Appendix E for additional selenium data, cf. Section 11.7). 

This chapter presents the chemical thermodynamic data for auxiliary compounds and complexes which are used within the NEA s TDB project. Most of these auxiliary species are used in the evaluation of the recommended selenium data in Table lll-l, Table II1-2, and Table III-3. It is therefore essential to always use these auxiliary data in conjunction with the selected data for selenium. The use of other auxiliary data can lead to inconsistencies and erroneous results. Additional auxiliary data used in this review are found in Appendix E, Table E-2 cf. Section II.7). 

The RWMC assigned a high priority to the critical review of relevant chemical thermodynamic data of inorganic species and compounds of the actinides uranium, neptunium, plutonium and americium, as well as the fission product technetium. The first four books in this series on the chemical thermodynamics of uranium, americium, neptunium and plutonium, and technetium originated from this initiative. 

The NEA Data Bank maintains a library of computer programs in various areas. This includes geochemical codes such as PHREEQE, EQ3/6, MINEQL, MINTEQ and PHRQPITZ, in which chemical thermodynamic data like those presented in this book are required as the basic input data. These computer codes can be obtained on request from the NEA Data Bank. 

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