Now, what about when the delta g is zero? Well, when the delta g is zero, that means our reaction has achieved equilibrium and this q value will become a k, the equilibrium constant. Now, what about the delta g with this degree symbol? What's the meaning of this quantity? Well, this describes the free energy value of the reaction under specific conditions called standard state conditions. And this describes conditions when the concentration of the reactors and products is equal to one molar.