And we get our cell voltage equal to gas constant times temperature tail and divided by moles of electrons times paradise constant times natural log of our equilibrium constant. So this expression basically relates our cells voltage and the concentration of our reactants and products or the ratio of the concentration. Now, notice in this equation we have R is our constant and F is also constant. And if we assume constant temperature of, say, 25 degrees Celsius, we can simplify this expression into the following expression. So, let's rewrite this expression. Cell voltage E is equal to a constant times a constant outcase because T is 298 in Kelvin.