In the reaction #SO_2Cl_2 harr SO_2 + Cl_2#, heat is evolved. What happens when chlorine (#Cl_2#) is added to the equilibrium mixture at constant volume?
reactions will always move to relieve stress. Adding
Increasing the concentration of
Increasing the pressure will also cause the equilibrium to move to the left as there are two volumes of gas in the products on the left and only 1 volume of gas in the reactants. So moving to the left will reduce stress on the system deceasing the total volume thereby reducing the pressure.
Increasing the temperature will also drive the equilibrium to the left, as heat is a product.