Chemical Thermodynamics and Activity Diagrams CRAN Task View: ChemPhys (http://CRAN.R-project.org/view=ChemPhys) This package includes functions and data sets to support chemical thermodynamic modeling in biochemistry and low-temperature geochemistry. The features include calculation of the standard molal thermodynamic properties and chemical affinities of reactions involving minerals and/or biomolecules; a database of thermodynamic properties of aqueous, crystalline and gaseous species; amino acid group additivity for the standard molal thermodynamic properties of neutral and ionized proteins; use of the revised Helgeson-Kirkham-Flowers equations of state for aqueous species; construction of equilibrium activity diagrams as a function of temperature, pressure, and chemical activities or fugacities of basis species. Software Depends: R (>= 2.10.0), utils Suggests: xtable Jeffrey M. Dick <jmdick@asu.edu> Jeffrey M. Dick <jmdick@asu.edu> GPL (>= 2) 2011-08-23 application/tgz http://CRAN.R-project.org/package=CHNOSZ