Chemsitry - Equillibrium Flashcards
If the forward reaction is ? (transfers energy from ? to the environment), the ? reaction will be endothermic (transfers ? from the ? to the reactants).
exothermic, reactants, backwards, energy, surroundings
The energy released/? by the forward ? will be exactly ? to the energy absorbed/? by the ? reaction
absorbed, reaction, equal, released, backwards
The concentrations of ? and products do ? change when a reaction is at ? equilibrium
reactants, not, dynamic
what will eventually be reached when reversible reactions happen within a closed system
Dynamic equilibrium
At dynamic equilibrium, how are the rates of the forwards and backwards reactions related?
they’re equal
why is equilibrium dynamic?
because both the forwards and backwards reactions are still taking place
what happens at equilibrium?
the rate of the forward reaction equals the rate of the backward reaction
how can the position of equilibrium be affected?
by changing the conditions in a reversible reaction
Le ? principle says that if any of the conditions of a ? reaction at equilibrium are changed, the ? system will ? to counteract whatever has ?
Chatelier’s, reversible, closed, adapt, changed
what can Le Chatelier’s principle be used for?
to predict the outcome of changes imposed on a system at equilibrium
what determines the relative amount of the substances involved in a reaction at equilibrium?
the conditions of the reaction
what does changing the temperature for a reaction at equilibrium do and what does the system do in response?
takes the system out of equilibrium. in response the system will try and restore equilibrium
what happens when the temperature decreases in equilibrium? (and what happens to the products)
the position of equilibrium shifts in the exothermic direction - meaning more products from exothermic reaction and less from endothermic reaction
what happens if there’s an increase in temperature in equilibrium and what happens to the products?
the position of equilibrium shifts in the endothermic direction - meaning more products from endothermic reaction and less from exothermic reaction
The position of equilibrium will shift towards the side of the reaction that produces the most gas molecules - when does this happen?
when the pressure is decreased
