News and Featured Products
Computational Thermochemistry - HSC or FactSage?
We distribute two families of computational thermochemistry programs - FactSage and HSC Chemistry for Windows. Their differences can be summarized in two sentences.
HSC is easier to use and less expensive, but it can only handle ideal gases, pure condensed phases, and dilute aqueous solutions.
FactSage, and its sister products ChemSheet and ChemApp, are much more powerful in that they can analyze solid or liquid solutions, non-stoichiomentric compounds, high pressure systems, and/or concentrated aqueous systems.
FactSage is the choice for straight thermodynamic analyses of systems of interest. It is the only family member to include direct plotting of phase diagrams. In addition to the powerful computational module, ChemSage includes a module for generating optimal system thermodynamic models from available thermodynamic and phase equilibria data. ChemSage also includes a model for staged reactor system.
ChemSheet is an Excel plug-in that allows equilibrium calculations to be incorporated into Excel worksheets. Ideal if you have an Excel process model or wish to use the publication features of Excel
ChemApp allows linkage of the FORTRAN subroutines used in FactSage to your own code so that equilibrium calculations can be carried out within the context of a broader application.
JANAF Tables on the Web
NIST has put the data from the 1998 version of the JANAF Tables in its webbook. The 1985 tables on floppy disk have been withdrawn from the market by NIST.