How can I calculate delta G of a reaction?

The energy associated with a chemical reaction that can be used to do work. The free energy of a system is the sum of its enthalpy (H) plus the product of the temperature (Kelvin) and the entropy (S) of the system:

G = H – TS

The change in the enthalpy (delta H) of the system minus the product of the temperature (Kelvin) and the change in the entropy (delta S) of the system:

Δ G =Δ H – TΔS

SPONTANEOUS: ΔG is negative (ΔG < 0)

NON-SPONTANEOUS: ΔG is positive (ΔG > 0)

EQUILIBRIUM: ΔG = 0

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