Question

How does concentration affect free energy?

Answer 1

`DeltaG=DeltaG^@+RTlnQ`

Explanation:

Let us look at the expression of free energy: `DeltaG=DeltaG^@+RTlnQ`

What is the relationship between free energy and concentration?

Well, concentration figures in the expression of free energy inside `Q` (reaction quotient).

For chemical reactions: `"Reactants" -> "Products"` the reaction quotient is given as `Q=("[Products]"_0)/("[Reactants]"_0)`

Any change on the initial concentrations of the reactants or products will change `Q` and therefore, affecting `DeltaG`.