Final answer:
The correct completion for the equation ΔG° = ________ TΔS° is ΔH° - TΔS°, which calculates the change in Gibbs free energy.
Step-by-step explanation:
The equation that correctly completes the expression ΔG° = ________ TΔS° is ΔH° - TΔS°.
This formula represents the change in Gibbs free energy (ΔG°) which is calculated by subtracting the product of the absolute temperature (T) and the change in entropy (ΔS°) from the change in enthalpy (ΔH°).
The units for enthalpy change (ΔH°) are typically in kilojoules per mole (kJ/mol), while the units for entropy change (ΔS°) are in joules per Kelvin per mole (J/K·mol).
The entropy change must be converted to kJ/K·mol in order to match the units of enthalpy.