So that's why the magnitude of these guys is the same, but the sign is different. So, why is it that we have a negative sign in front of the electrical work? Well, let's see why. The negative sign accounts for the fact that for a product favorite reaction, changing gibsi energy is negative while cell voltage is positive. So that's why we need to add that negative sign in. So, from before, we saw that electrical work is equal to number of moles times starbase constant times our cell voltage.