equilibrium 1 p1 Flashcards
dynamic equilibrium
the rate of the forward reaction is equal to the rate of the reverse reaction
what is an essential condition for an equilibrium mixture?
only occurs in a closed system where reactants and products cannot escape
le chatelier’s principle
if a system at equilibrium is altered, the position of equilibrium moves in the direction that reduces the effect of the initial change
how does temperature affect equilibrium?
increased temp shifts equilibrium in endothermic direction
decreased temp shifts towards exothermic
how does pressure affect equilibrium?
increased pressure shifts equilibrium towards side with fewer gaseous moles
decreased pressure shifts towards more gaseous moles
how does can high pressure increase rate of reaction?
increases collision frequency therefore increased number of successful collisions
what effect does a catalyst have on the position of equilibrium?
no effect - affects rate of forward and reverse reactions equally therefore no effect
what condition affects the value of Kc?
temperature
how do you form a Kc equation?
aA +bB ⇌ cC + dD
[C]c[D]d/[A]a[B]b
what are the units for Kc?
depends on equation - figure out using conc units
what type of system is Kc relevant for?
homogenous systems in equilibrium
what does Kc being greater or lesser than 1 suggest about the position of equilibrium?
> 1 = shifted to right
<1 = shifted to left
what affect does temperature have on Kc?
endothermic
increase - Kc increases
decrease - Kc decreases
exothermic
increase - Kc decreases
decrease - Kc increases
