What is the condition for a chemical reaction to be at equilibrium in terms of Gibbs free energy change ($\Delta G$)?
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Question

What is the condition for a chemical reaction to be at equilibrium in terms of Gibbs free energy change ($\Delta G$)?

Accepted Answer

For a system at constant temperature and pressure, the condition for equilibrium is $\Delta G = 0$. If $\Delta G 0$, it is non-spontaneous.

Chemical Thermodynamics