Source status: Attributed to Rudolf Clausius and Lord Kelvin
The total entropy (disorder) of an isolated system never decreases. Left alone, things get more disordered, not less.
- Rudolf Clausius and Lord Kelvin
Heat never flows from a colder body to a warmer one by itself.
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No engine can turn all of its heat into work. Some is always lost.
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You can reduce the disorder in one place, such as your desk, only by creating at least as much somewhere else.
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This law belongs with Murphy's Miscellaneous Laws, where small assumptions, timing, and system complexity tend to turn into memorable failures.
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