Entropy in chemistry and thermodynamics is a measure of the total amount of energy that cannot do work in dynamics. Entropy is also used to calculate the disorder phenomenon in the system. Entropy is an indicator of biodiversity in ecology. Entropy is a concept of life science, and the second law of thermodynamics is used to explain life phenomena.

The concept of entropy was first put forward by Clausius in 1864 and applied to thermodynamics. Information theory was first introduced by Claude elwood Shannon in 1948.