Prentice Hall © 2003
LOHS AP Chem    Schrempp  2008
8
•At equilibrium, as much N2O4 reacts to form NO2 as NO2 reacts to re-form N2O4:
•The double arrow  implies the process is dynamic.
•Consider
Forward reaction: A ® B  Rate = kf[A]
Reverse reaction: B ® A  Rate = kr[B]
•At equilibrium kf[A] = kr[B].
The Concept of Equilibrium