ALT A visual summary of Le Chatelier's Principle and the effect of stresses on equilibrium reactions. There are just three boxes. The first paraphrases Le Chatelier's principle (if you disturb an equilibrium it will respond by shifting in the direction that counteracts the change). The second box shows the effect of adding more starting material, changing the pressure or heating a reaction in a cartoon style using dots to represent molecules. It is not accurate but the principle is what matters. The final box shows all the different effects of stresses on a simple exothermic reaction.