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Free Energy Change and Standard Free Energy Change

What is the difference between the free energy change (delta-G) for a reaction and the standard free energy change (delta-G°') for the reaction?

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Free Energy Change and Standard Free Energy Change

Question

What is the difference between the free energy change for a reaction and the standard free energy change for the reaction?

Explanation

By definition, for all spontaneous reactions, the free energy change of the reacting system must be negative. In other words, the overall free energy of the system decreases. This is an absolute and never changes.

A reaction can occur spontaneously only if delta-G is negative. The flip side of this statement is this: a reaction cannot occur spontaneously if delta-G is ...

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