Exam 3 Flashcards
(46 cards)
equilibrium constant
K
what does the equilibrium constant change with?
temp
what does a large K value mean?
reaction is product-favored
what does a small K value mean?
reaction is reactant-favored
what does chemical equilibrium mean?
forward rate=reverse rate
reaction quotient
Q
what causes system stress?
- addition/subtraction of a reactant/product
- altering partial pressures
- change in the volume while keeping a constant temp
what does an increase in temp in exothermic reactions mean?
a lower K value (they produce less)
what happens when Q>K?
the reaction occurs in the reverse direction
what affects equilibrium?
- change in the amount of product/reactant
- change in temp
- change in the volume of gas
which way does the reaction move when you add more reactant?
towards the products
what happens to a reaction when you change the volume of a gas?
change to the partial pressure
how does a decrease of 2 of the volume affect the partial pressure?
increases the partial pressure by 2
what does a decrease in the volume/increase in pressure move the reaction towards?
side with the lower number of moles
what does an increase in the volume/decrease in pressure move the reaction towards?
side with more moles
what does an exothermic reaction move the reaction direction towards?
reactants
what does an endothermic reaction move the reaction towards?
products
what does an increase in temperature do to the direction of a reaction?
forwards
what does a decrease in temperature do to the direction of a reaction?
reverse
RICE
reaction, initial concentration, changes, equilibrium concentration
if a reaction quotient has a smaller value than the equilibrium constant
the reaction will continue to make more products
increasing the temp in an exothermic reaction results in
more reactants and fewer products
Bronsted-Lowery acid definition
H ion donor
Bronsted-Lowery base definition
H ion acceptor
