Science
Entropy.
Definition
A measure of the disorder or randomness in a system. Nature tends toward increasing entropy, meaning systems naturally move toward more disordered states. Entropy is central to the second law of thermodynamics.
Examples
Real-world.
- 1 Ice melting into water increases entropy as molecules move more freely
- 2 A gas expanding to fill an entire room
- 3 Shuffling a deck of cards increases disorder
Key Fact
ΔS_universe > 0 for all spontaneous processes (Second Law of Thermodynamics)