3.8 Equilibrium Constants Flashcards
What is the symbol for an equilibrium constant using concentration values
Kc
What kind of brackets for Kc
Square
How to calculate Kc
[products] / [reactants]
Symbol for an equilibrium constant using partial pressure values in gas systems
Kp
What kind of brackets for Kp
Round
How to calculate Kp
(pProducts) / (preactants)
What will effect Kp/Kc
Only temperature
How does increasing the temperature of an exothermic reaction affect Kc/Kp
The equilibrium will shift left
This will decrease the products and increase the reactants
DECREASE Kc/Kp
How does increasing the temperature of an endothermic reaction affect Kc/Kp
Shifts equilibrium right
Increases products and decreases reactants
INCREASES Kc/Kp
What does it mean if Kc is less than 1
• little products are formed
• most of the mixture is starting materials
• the /\G is positive so reaction doesn’t occur spontaneously
What does it mean if Kc is 1
Similar amounts of starting materials and products
What does it mean if Kc is bigger than 1
• most reactants have been converted into products
• /\G is negative - reaction occurs spontaneously
