Can you reverse entropy without using energy?

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Reversing entropy without using energy is fundamentally challenging, as any attempt to do so typically requires an external energy source. The discussion highlights that while an impulse might temporarily alter entropy, it ultimately relies on energy input from outside the defined system. The consensus is that true entropy reversal cannot occur in a closed system without energy expenditure. Engaging with the laws of thermodynamics reveals that energy is essential for any process that aims to decrease entropy. Therefore, reversing entropy without energy remains a theoretical impossibility.
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Can you reverse entropy without using energy?
 
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You might be able to use an impulse, however if you go outside the system you defined you are using energy.
 

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