Una Formulación sencilla, cuantitativa y precisa para el principio de Le Chatelier

In this paper it is presented an alternative teaching approach to avoid the ordinary Le Chateliers qualitative rule. This attempt is based on a well-founded general criterion of spontaneity. Hence, we endeavor an analysis of the different cases involving changes in the mass and the pressure (volume) of a chemical system in equilibrium. Our proposal accurately allows the beginning chemistry student to make predictions about the evolution of a perturbed chemical equilibrium system. In this way we draw up an easy, exact, and general quantitative formulation for the Le Chateliers principl