Second Law of Thermodynamics

Definition

This law states that the total entropy, or disorder, in an isolated system can only increase over time. It also implies that energy transfers or transformations are never 100% efficient.

Related terms

Entropy: A measure of disorder or randomness in a system.

Heat Energy: The form into which all other types of energy eventually degrade according to the second law of thermodynamics.

Isolated System: A system that does not exchange matter or energy with its surroundings.