Entropy is one of the most important concepts in physics, but also one of the most abstract and difficult to understand physical quantities. Historically, this concept arose in thermodynamics, studying the conversion of heat into work and the transfer of heat from a body with a high temperature to a body with a low temperature. Subsequently, this concept acquired other interpretations in contexts such as statistical mechanics and information theory.

This article is devoted to revealing the essence and content of the concept of entropy, which played a major role in the development of physics and thermodynamics.

entropy, information , heat engines, thermodynamic probability, state function, Carnot cycle, amount of heat.

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