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.