Consider the following reaction at equilibrium. what effect will adding 2.3 mole of rn to the reaction mixture have on the system? 2 h2s(g) + 3 o2(g) ⇌ 2 h2o(g) + 2 so2(g) no effect will be observed. the equilibrium constant will increase. the equilibrium constant will decrease. the reaction will shift to the right in the direction of products. the reaction will shift to the left in the direction of reactants.