10. equilibrium I (as) Flashcards
reversible reactions can reach
dynamic equilibrium
dynamic equilibrium can only happen in
closed systems
closed systems mean
nothing can get in or out
dynamic equilibrium is
the forward reaction will be going at exactly the same rate as the backward reaction
kc is
equilibrium constant
kc gives you and idea of
how far to the left or right the equilibrium is
homogenous system def
system in which everything is the same physical state
general formula of kc
+ what does lower case mean
aA + bB reversible arrow dD + eE
kc= (D)^d(E)^E/ (A)^a(B)^b
lower case= number of mol
heterogenous system def
not everything is in the same physical state
unlike homogenous equilibria
heterogenous equilibria not everything is included in the expression for kc
do catalysts affect the equilibrium constant and why
no
they just speed up the rate at which dynamic equilibrium is reached
le chatelier’s principles predicts
what will happen if conditions are unchanged
how do you change the position of equilibrium
if you change concentration pressure or temp of a reversible reaction
le chatelier states
if there’s a change in concentration, pressure or temp the equilibrium will move to help counteract the changes
le chatelier changes to concentration
if you inc con of reactants
inc con of products
increase conc of reactants equilibrium tried to get rid of extra reactants and increases products ,, shifts to the right
inc conc of products equilibrium makes the reverse reaction faster ,, shift to the left
le chatelier changes to pressure
if you inc the pressure + dec pressure
inc pressure shifts equilibrium to the side with fewer molecules
to reduce pressure
decreases pressure shifts equilibrium to the side with more molecules
to raise pressure
le chatelier changes to temp
if you inc temp / decrease temp
inc temp means add heat
equilibrium shifts the endothermic direction to absorb more energy
decreases temp means remove heat
equilibrium shifts to the exothermic direction to replace the heat
in the industry what happens to conditions
conditions chosen are a compromise
