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From this page, you can download XSEOS - Excess Gibbs Free
Energy Models and Equations of State - a freely available Excel add-in to
compute thermodynamic properties using many traditional and modern
thermodynamic models. These properties are programmed as functions in
Visual Basic for Applications (VBA), totaling about 22000 lines of code.
Users can call these functions from their Excel spreadsheets.
XSEOS has open source code and is distributed under the GNU
General Public License, version 3. Therefore, it is an expandable platform
and will hopefully contribute to the exchange of experiences in the
teaching of Chemical Engineering Thermodynamics. XSEOS runs in Excel, which
is part of the Microsoft Office suite, available from Microsoft resellers.
Click here to download a zipped file
that has five files inside: the XSEOS manual, the Excel add-in, its
installer (only necessary for Excel 2003), a sample spreadsheet, and a
specific sample file with surface tension examples. Please, unzip all files
in the same directory (preferably C:\XSEOS) and follow the installation
instructions provided in the manual. The manual also gives hints on how to
use the program and lists all thermodynamic models currently available in
the package. The current version of XSEOS has been successfully tested in
Excel 2003, 2007, and 2010.
After installation and before reading the manual, you may wish
to watch a few movies that illustrate how to use the program and try some
of the examples by yourself using the Excel templates provided. To watch
the movies you will need Adobe Flash Player. If not available in your
computer, you can install it from here.
The movies and templates are organized according to the type
of calculation and thermodynamic model.
Depending on your computer settings, the movies may look
blurred. If this happens, right-click your mouse once the movies starts and
then click on "Zoom in".
Type of Calculation
Activity coefficients: movie and Excel template
Activity coefficients with group contribution method: movie and Excel template
Enthalpy of vaporization: movie and Excel template
Excess properties: movie
and Excel template
Boiling temperature: movie1 and Excel template1 ; movie2 and Excel template2
Bubble point with activity coefficients: movie and Excel template
Bubble point with fugacity coefficients: movie and Excel template
Isenthalpic expansion: movie and Excel template
Isothermal flash: movie and Excel template
Parameter fitting of excess Gibbs free energy models: movie and Excel template
Thermodynamic Model
Margules 2-, 3-, and 4- suffix: movie and Excel template
Mattedi-Tavares-Castier (MTC):
movie and Excel template
NRTL: movie
and Excel template
Peng-Robinson equation of state: movie1 and Excel template1 ; movie2 and Excel template2
Predictive Soave-Redlich-Kwong (PSRK): movie and Excel template
Regular solution theory: movie and Excel template
Soave-Redlich-Kwong: movie and Excel template
UNIFAC: movie
and Excel template
UNIQUAC: movie and Excel template
van der Waals: movie and Excel template
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