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Stress affecting equilibrium (Changing Concentration (Adding Reactants…
Stress affecting equilibrium
Changing Concentration
Adding more reactants or removing products increases the collisions, changing equilibrium.
Removing Products
results in a shift to the right and the production of more products
Adding Reactants
According to Le Chatelier's principle
New equilibrium position
More products are made to balance
Forward reaction rate increases
More collisions
Adding more reactants adds stress and upsets equilibrium
equilibrium shifted to the right
Adding Products
results in a shift to the left and the conversion of products to reactants
Rahaf Labban 11A
Changing the temperature
Equilibrium constant
: The higher the K the more product
Endothermic reaction
Lowering heat will result in a lower K
Increasing heat will result in a higher K
Exothermic reaction
Lowering heat will result in a higher K
Increasing heat K will result in less K
Equilibrium position
Endothermic reaction
: In an endothermic reaction heat is a reactant and the equilibrium shifts in the direction in which heat is used up (right)
Lowering heat will result in the decrease of products
Increasing heat will result in the increase of products
Exothermic reaction
: In an exothermic reaction heat is a product and the equilibrium shifts in the direction in which heat is used up (left)
Increasing heat will result in the decrease of products
Lowering heat will result in the increase of products
Changing volume & pressure
Pressure acts as stress on the equilibrium
so the gases will go to the side with less particles.
Increased # of particles increases pressure
Boyle's law: decreasing volume increases pressure
Adding catalyst to equilibrium position