So, this guy releases two electrons, while this guy takes those two electrons, gains two electrons forming our copper solid. Now, these electrons in the end, end up crossing out. Now, our cell voltage is 1.1 volt. So let's use this formula to approximate how much energy this battery or this electrochemical cell can produce with the charge that it has. So, the change in gates free energy is equal to negative of the number of moles of electrons. Well, in this case, I specifically left these guys in to show you how many moles of electrons we have.