ChemApp

6.4 ChemApp is fast, but I need it to be even faster, what can I do?

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Although ChemApp calculates even complex equilibria remarkably fast (see section 6.2), “speed” is always a relative thing. If one is frequently doing 100000 equilibrium calculations in a row as part of a simulation program, one is interested in every possible technique that saves computation time. Here are a few techniques that help speeding up the calculations. […]

6.4 ChemApp is fast, but I need it to be even faster, what can I do? Read More »

5.1 I already know about ChemSage and/or FactSage, how does ChemApp differ from it?

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The following are the main differences between ChemApp and ChemSage, as well as its successor FactSage ChemSage/FactSage are interactive, standalone programs. They do not need any other tools apart from thermochemical data-files or databases. They are the tools of choice for users who do not wish to do any programming work. Compared to ChemApp, ChemSage/FactSage have only limited support

5.1 I already know about ChemSage and/or FactSage, how does ChemApp differ from it? Read More »

5.2 For which problems is ChemApp the better tool, and for which is ChemSage/FactSage?

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With respect to the text below, note that FactSage is the successor of ChemSage. If you need an interactive, standalone program that can output results in the form of tables and graphs, and can automatically calculate phase diagrams, use ChemSage/FactSage. It is an everyday desktop tool that is easy to learn and does not require programming knowledge at

5.2 For which problems is ChemApp the better tool, and for which is ChemSage/FactSage? Read More »

5.6 I would like to use data from my FactSage databases with ChemApp. Does ChemApp require direct access to the FactSage databases, i.e. does it have to be installed on the same machine?

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No, ChemApp need not and cannot directly access any FactSage database. Thermochemical data from FactSage databases is made available to ChemApp (and ChemSheet, for that matter; i.e. any software that internally contains ChemApp) via ChemSage-style data-files, which are user-defined subsets of the databases available for FactSage. See section 7.7 for more information. For general information on data-files,

5.6 I would like to use data from my FactSage databases with ChemApp. Does ChemApp require direct access to the FactSage databases, i.e. does it have to be installed on the same machine? Read More »

5.7 Do I need FactSage or ChemSage in order to use ChemApp?

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No, no other software from us is required in order to run ChemApp. Many customers also use FactSage for instance, because they prefer to have an interactive program available too, but there is no technical reason why FactSage is required (see also section 5.2). Of course customers who also have FactSage (or ChemSage) benefit from the fact that

5.7 Do I need FactSage or ChemSage in order to use ChemApp? Read More »

4.1 For which platforms is ChemApp available?

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An up-to-date list of platforms where ChemApp has been tested and used can be found on the ChemApp web page. The list of platforms for which ChemApp and ChemApp light are available might differ. Please check the ChemApp light section of the ChemApp web page. If ChemApp or ChemApp light is not available yet for the platform of your choice, please contact us (support@gtt-technologies.de) to

4.1 For which platforms is ChemApp available? Read More »

4.2 The way ChemApp or ChemApp light has been compiled doesn’t work for me, can you help?

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This happens sometimes with Unix versions of ChemApp/ChemApp light, for instance you need a 64-bit version but the distribution archive contains a 32-bit version, you need a version that does (or does not) have underscores prepended to the subroutine names, and you need a version that has been compiled exactly the other way.  In most cases,

4.2 The way ChemApp or ChemApp light has been compiled doesn’t work for me, can you help? Read More »