1. From GWB apps, File → View → …\thermo.tdat From TEdit, File → Open → Thermo Data… → …\thermo.tdat From Windows explorer, double-click the file You can launch TEdit to view thermo datasets. GWB’s default dataset.

2. The Header section describes the dataset. Set the principal temperatures and activity coefficient terms in the Tables section All species are composed from the Elements. The Basis species are the building blocks. Redox couples, Aqueous species, Minerals, and Gases are formed by reaction between existing species and have an associated log K.

3. Right click → add Enter the new element’s name, symbol, and molecular weight, then click Apply. Fill in the template to add the elements, species, etc. that you need in your thermo dataset.

4. You can use TEdit to copy entries from one thermo dataset (the source) into another (the target). Open both datasets in TEdit and select the entry you’d like to copy.

5. Right click → add Supply reaction and log Ks in terms of arbitrary set of species. Automatically recast reaction in terms of Basis or Redox species. Final reaction as it will appear in thermo data → Apply You can rebalance reactions and automatically recalculate log Ks.

6. H 2 (aq) is the new redox pivot, and O 2 (aq) becomes a redox species. Exchange the positions of basis species O 2 (aq) and redox species H 2 (aq). You can exchange the position of Basis, Redox, and Aqueous species in a thermo dataset. All affected reactions are automatically rebalanced.