When the forward and reverse paths of a change occur at the same rate,
A. the system is conserved.
B. the system is in equilibrium.
C. the change must be physical.
D. the change must be chemical.
When the forward and reverse paths of a change occur at the same rate, "B. the system is in equilibrium". This is because there is no net flow of reactants at this time. This stage can be reached quickly or after long periods of time.
