In fact, as you suggest, the entropy of an isolated system can remain constant or decrease: it depends on the nature of its boundary. What is correct is that for any subsystem we have …

Aug 27, 2019 · 2) Is internal energy conserved in an isolated system? I looked up conservation of mechanical energy and it says that mechanical energy is conserved in an isolated system with …

Now, this still does not explain why the entropy should increase, because the time evolution of an isolated system is unitary (there is a one to one map between final and initial states). So, …

The concept of an isolated system is an approximation. Like all approximations, it applies to some systems better than others. A billiard ball feels only a weak frictional force in the form of rolling …

Jul 6, 2022 · What motive do I have in choosing an isolated system? I mean, isolated systems do not interact with their surroundings, then why are they even useful? In open and closed …

Jan 10, 2023 · Yes. As traditionally defined in thermodynamics, a closed system is one with no mass transfer between the system and the surrounding, and an isolated system is a closed …

Each box is isolated from the environment and from the other box. Then each one is in equilibrium and the combined system is also in equilibrium. We can measure changes in entropy from this …

Dec 28, 2014 · Now, if the system is isolated, how has it changed to bring the equilibrium? It is an axiom of thermodynamics that when a body of material starts from a non-equilibrium,state of …

Jun 26, 2019 · Would it then become an isolated system (supposing that the friction force is also considered internal)? All the examples I read about non-isolated systems are systems in which …

Jun 24, 2023 · If you change the constraints then you can have a spontaneous internal rearrangement that does not affect the overall energy but internally increases the entropy until …