And so, our overall total pressure is less. And finally, let's look at how concentration affects our equilibrium of our reaction according to Leslie Lee's principle. Now, let's look at the same reaction. 1 mol of them react to three moles of H two and gas state to produce two moles of ammonia and heat an exothermic reaction. So, how will increasing reactants change our equilibrium? Well, increasing the concentration of either or both the reactants shifts equilibrium to the right.