Chemical Equilibrium

Chemical Equilibrium

when the found rate equals the reverse rate

le chatliers principle

shift away from stress; only applies to aq and g

equilibrium position

left = reactant favored, small k : right = product favored, big k

definition of stress to reaction

changes in molarity, pressure, temperature, volume, or energy

role of catalyst

speeds or slows reaction rate, does not affect equilibrium position

effects of concentration change

shift away from whats added, shift towards whats removed

changing pressure

away from added, towards whats taken : always shifts towards less mols of gas, increase pressure / decrease volume

adding inert or uninvolved gas

increases total pressure, does not affect position

change in temperature

affects k-value : larger temp, small k ; small temp, big k

change in energy

shifts towards products for exo reactions; shifts towards reactants for endo reactions.