kc and equilibrium Flashcards
what does dynamic mean
the forward and backward reactions proceed at equal rates
equilibrium
the concentration of the reactant and products are constant
how is a dynamic equilibrium reached
rate of reaction of the forward and backward reaction becomes the same
le chateliers principle
the position of equilibrium will shift to oppose a change made to the system
if concentration decreases
-equilibrium shifts to the left
-to oppose the decrease of …
-yield of reactants will decrease
if pressure increased
-equilibrium shifts to the right
-oppose increase in pressure
-fewer moles on the right
-so yield of products increases
if pressure is decreased
-equilibrium shifts to the left
-oppose decrease of pressure
-more moles on the left
-do yield of reactants increases
if there were equal number of moles of product and reactant, what effect would changing the pressure have
no effect
increasing volume causes a ________ in pressure
decrease
decreasing volume causes a __________ in pressure
increase
exothermic reaction
-releases heat energy
-temperature of surroundings increases
-enthalpy change is negative
endothermic reactions
-absorb heat energy
-temperature of surroundings decreases
-enthalpy change is positive
