Chemical Equilibrium Flashcards
What does dynamic equilibrium mean?
It occurs when the rate of forward reaction equals the rate of reverse reaction and the concentration of reactants and products remain constant in a closed system.
Changing what factors can alter the position of equilibrium?
- conc of reactants or products
- pressure
- temperature
Explain the Le Chatelier’s principle
If a system at equilibrium is distributed, the equilibrium moves in the direction that opposes the change.
What effect does a catalyst have on the position of equilibrium?
No effect
What condition affects the value of Kc?
- conc
- catalyst
- pressure
- temp
Temperature
What type of system is Kc relevant for?
Homogeneous systems in equilibrium.
What does Kc being greater or less than 1 suggest for the position of equilibrium?
Greater than 1 = over to the right
Less than 1 = over to the left
What effect does decreasing the temperature of an endothermic reaction have on Kc?
Kc decreases
What effect does increasing the temperature of an endothermic reaction have on Kc?
Kc increases
What effect does decreasing the temperature of an exothermic reaction have on Kc?
Kc increases
What effect does increasing the temperature of an exothermic reaction have on Kc?
Kc decreases
