Kc and Kp Equilibrium (Hetero and Homogeneous) Flashcards
What is the equation for Kc?
Kc = [products]/[reactants]
[] = concentration
What happens to the units in Kc and what are they?
They cancel out
moldm^3
How does temperature affect Kc?
Temperature increases/decreases
Le Chatelier states the system will do reduce/increase the temperature
Favour endothermic/exothermic reaction
Equilibrium shifts
more reactants/products made
How does pressure affect Kc?
Pressure increases/decreases
Le Chatelier states the system will do reduce/increase the pressure
Equilibrium shifts as there are more/less moles in the products/reactants
more reactants/products made
What is the equation for Kp?
Kp = p(product)/p(reactants)
What are the units for Kp?
Pa, atmospheres
What happens to concentration in Kc?
doesn’t change
NH3 is increased so Kc numerator increases
system is no longer in equilibrium
system will increase rate of backward reaction (Le Chateliers)
So Kc numerator increases
equilibrium and kc is restored
What is homogeneous equilibria?
all substance in the equilibria are in the same state
What is a heterogeneous equilibria?
substances in the equilibria are in different states
solids and liquids aren’t part of the k expression
