open system vs. closed system

open system vs. closed system: ������'s the difference?

In thermodynamics, open system and closed system refer to regions separated from their surroundings by a boundary. An open system has a boundary that admits a transfer of matter or energy across it. A closed system, on the other hand, has a boundary that admits no transfer of matter or energy. As an analogy, imagine a water bottle with a cap on it versus one that’s open—the closed water bottle can’t let water in or out, but the open water bottle can do both.