CH302H - Principles of Chemistry II: Honors
Spring 2016, Unique 49420

Lecture Summary, 11 February  2011

Equilibrium Continued:   Over the past couple of days we have been discussing how to influence the equilibrium position of any chemical reaction.  This is described by Le Chatelier's principle: If a system in equilibrium is stressed, the system will react in such a way to relieve the stress.  We considered three stresses: 1) changing the amount of a reactant or product in the reaction vessel; 2) changing the pressure of the system; and 3) changing the temperature of the system.  In all cases we were able to derive an expression that not only confirmed our prediction from Le Chatelier, but in each case was able to quantify how far the reaction would shift.