Chapter 16 Flashcards
Equilibrium
the state of a system by which the rate of the rxn in forward direction equals the rate of the rxn in reverse direction
What type of change is there during equilibrium
no net change
equilibrium constant expression is also called…
low mass action
what is the equilibrium constant expression
products over reactants
what two way can equilibrium be expressed
pressure or concentration
concentration units
M
pressure units
ATM
describe the relationship between Kc and Kp
Kc and Kp are proportional, but not necessarily the same
when you reverse a rxn, what must you do to the expression
reverse the equilibrium constant expression as well
ex: Kc= [B][C]/[A] ….. Kc’=[A]/[B][C]
equation for Kp to Kc
Kp=Kc(RT)^change in n
what is constant R
0.8206 L*atm/mol k
Homogeneous equilibrium, all reactants and products are…
in the same phase
In Keq expression, what species are included and what species are excluded
only gases and species dissolved in solution are included in the expression, EXLUDE any pure solids or pure liquids
does equilibrium constant depend on temperature?
yes
Kp has reactants and products expressed as..
pressure
what does the magnitude of the equilibrium constant represent
the extent of the reaction
Keq > 1…
reaction favors the products, shifts left
Keq < 1…
reaction favors the reactants, shifts right
Keq = 1
equilibrium
what is Q
reaction quotient, it is the measure of extent of reaction at given time… snapshot
Q < Keq
too many reactants, forms more products
Q > Keq
too many products, forms more reactants
if you add reactants what happens
rxn shifts right, more product formed
