Chapter 19- Kp Flashcards
What is a reversible reaction?
A reaction in which the products can react together to form the original reactants
What is equilibrium?
When the rate of forwards and backwards reactions in a reversible reaction are equal. The concentrations of reactants and products remain constant.
What is the equilibrium constant Kp?
The equilibrium constant for gaseous equilibria. All reactants and products must be in gaseous state for Kp to be calculated.
What is a homogeneous system?
A system where all the reactants and products are in the same phase
What is partial pressure?
The pressure exerted by a particular gas in a mixture in a closed system
How do you calculate partial pressure?
Mole fraction x total pressure
How do you calculate total pressure using partial pressures?
Add up the partial pressures
What is a mole fraction and how do you calculate it?
Value used to calculate partial pressure
Mole fraction (A) = moles (A)/ total moles
How does change in concentration, pressure or volume affect Kp?
Does not affect it. Only change that changes Kp is a change in temperature.
How does a catalyst affect Kp?
Does not affect it. Increases rate of both forwards and backwards reactions equally.
How does a catalyst affect reversible reactions?
Increases the rate at which equilibrium is reached, does not change position of equilibrium as it increases rate of forwards and backwards reactions equally.
