Dynamic Equilibrium
- The system looks stable, but changes are still happening inside.
- Forward and backward processes continue at the same rate.
- Example: In a closed container of water, some molecules keep evaporating while others condense back, but the overall amount of liquid and vapor stays constant.
Static Equilibrium
- The system is completely at rest, with no internal movement.
- No forward or backward processes take place.
- Example: A book lying still on a table — no forces are changing, everything is balanced and unmoving.
In short: Dynamic equilibrium is active but balanced, while static equilibrium is completely still and inactive.