Chemical Equilibrium Flashcards
How do you find the equilibrium constant?
aA + bB cC + dD
K = [C]^c [D]^d / [A]^a [B]^b
Define Chemical equilibrium
occurs when a reaction and its revers reaction proceed at the same rate
If K > 1, the reaction is…
the reaction is product-favored
If K < 1, the reaction is….
reactant-favored
The Equilibrium Constant with pressure
k = [PC^c] [PD^d] / [PA^a] [PB^b]
what’s the relationship between Kc and Kp?
Kp = Kc (RT) ^ (delta)n
Define Homogeneous Equilibrium
involves substances that are in the same phase (usually gas or liquid)
Define Heterogenous Equilibrium
Substances in equilibrium are in different phases
Comparing Q to K: Q , K
there is too much reactant, and the equilibrium shifts to the right
Comparing Q to K: Q = K
the reaction is at equilibrium
Comparing Q to K: Q . K
there is too much product and the equilibrium shifts to the left
What does Le Châtlier’s Principle state?
If a system at equilibrium is disturbed by a change in temperature, pressure, or the concentration of one of the components, the system will shift its equilibrium position so as to counteract the effect of the disturbance
The Haber Process: If H2 is added to the system, N2 will
be consumed and the two reagents will form more NH3
What do catalysts do
increase the rate of both the forward and reverse reactions
equilibrium is achieved faster, but the equilibrium composition remains unaltered
