Question

what does second thermodynamic law really states?

Answer 1

Hey mate, here is your answer :
The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time. The total entropy can remain constant in ideal cases where the system is in a steady state(equilibrium), or is undergoing a reversible process.

Answer 2

Hey !

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The second law of thermodynamics states that the entropy of any isolated system always increases. The third law of thermodynamics states that the entropy of a system.

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Thanks !