This is our cell voltage of our electrochemical cell. Now, in the previous lecture we learned that there's a relationship between our cell voltage and our equilibrium constant, namely this equation here. Now, we also saw in that same lecture that we can convert this formula at 25 degrees Celsius to the following formula. Log k equals number of moles times our cell voltage divided by this number here. Zero point 52. Now, this number comes from the fact that both r and F are constants.