Word
Entropy
A measure tied to how many microscopic arrangements can produce the same visible state; isolated systems tend toward states that can occur in more ways
Examples
Coffee cools because there are vastly more ways for its energy to spread through the room than to stay in the cup.
Gas released into an empty chamber spreads out because almost all possible arrangements fill the chamber.
Origin
Rudolf Clausius coined entropy in 1865 from the Greek tropē, “transformation,” choosing a form that echoed “energy.” Clausius defined it through heat and temperature. Ludwig Boltzmann later gave it a statistical meaning: entropy grows with the number of microscopic arrangements compatible with a system's visible state.
How it connects
The word for how many microscopic arrangements hide behind the same visible state.
This word appeared in The future has more ways to happen, the Involves connection for August 8, 2026, which asked: Why does an egg break but never put itself back together?
Check yourself
Which statement best captures entropy?
A measure tied to how many microscopic arrangements can produce the same visible state; isolated systems tend toward states that can occur in more ways.. Right. Coffee cools and gas spreads because there are vastly more ways for energy and particles to be spread out than concentrated.
What the sources establish
Rudolf Clausius coined the term entropy in 1865 from Greek tropē, “transformation,” and defined it through heat and temperature.
Boltzmann gave entropy a statistical meaning: it grows with the number of microscopic arrangements compatible with a system's macroscopic state.
Sources
Entropy (Encyclopaedia Britannica, 2024), Clausius, Boltzmann, and the statistical second law