Equilibrium concentrations are tracked over time after a sudden change.
The graph shows a sudden increase in [A] then decay to a new equilibrium. What perturbation occurred?
- A
Volume was increased.
- Bcheck_circle
Pure A was added to the system.
- C
Temperature was lowered.
- D
Catalyst was added.
Explanation
A spike in [A] followed by gradual decay (toward new eq) is the signature of adding A. The system shifts to consume some of A.