ELI5-What is entropy?
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Many of the analogies people provide are misleading. The example of cleaning a room requires input energy to get it to an “organized” state. However you could spend the same amount of energy to trash a room. What we as humans consider organized or not is completely arbitrary as far as the universe is concerned.
Entropy is inversely related to the energy in a system. High entropy therefore means low energy. Low energy equals low heat. As the universe moves toward increasing entropy, it will eventually suffer a heat death, meaning no heat will exist.
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