And so this reaction releases useful energy that can be used to power other processes and reactions inside our cells and inside our body. Now, if the delta g is positive, what that means is that particular reaction will be endergonic, non spontaneous, and a positive delta g means we have to input energy for that reaction to actually take place. And in fact, inside our body, we can use exergonic reactions to produce energy and then that energy can be used to carry out undergonic reactions. 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?