It is notable that the (“not”) on DfG indicates that the DG value is based on the reaction at
standard conditions (1 M solution concentration, 1 atm gas pressure). Temperature is not part of the
standard conditions, but commonly, a temperature of 298 K is used. If the concentration is different
from 1 M or 1 atm gas pressure, the change of the Gibbs free energy is written as DG.
Using the Reaction Equations mode, chemical compounds and reactions were analyzed, in order to
calculate the change of the Gibbs free energy (DfG) at standard conditions. Calibrating a chemical
reaction, DrG is calculated by Equation (3), when the chemical reaction follows Equation