THERBAL is a Excel-based equilibrium calculation program. It uses the FREED database, plus specialized databases derived from FREED. THERBAL allows repetitive calculations at variable temperature, pressure, and variable input of a substance. A built-in charting feature can generate a scatterplot of results. It also has a target feature that will seek the value of an input species to attain a closed heat balance. The equilibrium species are expresssed as amount, mol fraction, and mass, and DG° for all species. The activity is also expressed for unstable condensed phase species .
THERBAL is currently being updated to the latest Windows OS and Excel 2016