4 ms·

Thank you whoever chose to downvote. Nothing like punishing genuine curiosity, ay!

• engineer_22 6y ago
  It violates entropy because work is being done to the combined system. The subdivided systems, if looked at in their own reference frame, would exchange entropy and mass which is work. After that time, If all else is held equal, your intuition is correct that entropy would be conserved in each subdivided system.