Chemistry - Chapter 16: Dynamic Equilibrium Part 2

Disturbance Causing Pressure Increase/Volume Decrease

system will respond by reducing number of gaseous molecules in the container, equilibrium will shift in the direction that generates fewer number of gaseous molecules

Disturbance Causing Pressure Decrease/Volume Increase

system will respond by increasing number of gaseous molecules in the container, equilibrium will shift in the direction that increases number of gaseous molecules

Disturbance Causing Pressure Increase/Volume Decrease

system will respond by reducing number of gaseous molecules in the container, equilibrium will shift in the direction that generates fewer number of gaseous molecules

Disturbance Causing Pressure Decrease/Volume Increase

system will respond by increasing number of gaseous molecules in the container, equilibrium will shift in the direction that increases number of gaseous molecules

Effect of Catalyst on Equilibrium

lowers the activation energy of forward and reverse reactions to the same extent, increases rates of forward and reverse reactions, shortens time needed to reach equilibrium, has no influence on the equilibrium position

Le Chatelier’s Principle

when chemical system (reaction) at dynamic equilibrium is disturbed, system counteracts effect of disturbance by shifting its equilibrium; reactants/products must be part of equilibrium constant expression to cause an effect on equilibrium

Things that Do Not Have Effect on Equilibrium

addition/removal of pure solid/pure liquid and adding an inert gas for a gaseous reaction