Dynamic equilibrium

What is a reversible reaction?

a reaction that can move in the forward or backward reaction

What is a dynamic equilibrium?

the forward and backward reaction are equal

what factors can change position of equilibrium?

• Changing the concentration of one of the reactants or products

• Changing the temperature

• Changing the pressure in reactions that involve gases

can a catalyst change the position of equilibrium?

• no

• peed up how quickly the reaction reaches equilibrium.

What is Le Chaterlier Principle?

• if a factor affecting the posoition of equilibrium is altered, the position of the equilibrium shifts to oppose the effect of the change

What position does the reaction go if you increase the temperature?

endothermic direction

What position does the reaction go if you decrease the temperature?

exothermic direction

why does increasing the temperature make the system favour the endothermic reaction?

counteracts change by releasing heat

What happens to the position of equilibrium if you increase the pressure?

• moves to side with less molecules

What happens to the position of equilibrium if you decrease the pressure?

• moves to side with more molecules

What happens to the position of equilibrium if you increase the concentration of the reactant?

towards side of product

What happens to the position of equilibrium if you decrease the concentration of the reactant?

product converted back to reactant

How to calculate Kc?

product / reactant

How to know if a temperature is endothermic or exothermic in forward direction?

• exothermic - negative sign

• endothermic - positive sign

if Kc > 1.0 then?

equallibrium lies to product ( right )

if Kc < 1.0 then?

equallibrium lies to reactions (left)