Why heat never flows from cold to hot on its own
In short: Explore the fundamental rule of the universe that dictates how energy moves and limits the work we can perform. This video explains the Second Law of Thermodynamics and its essential role in understanding biological systems.
The Second Law of Thermodynamics describes the limitations on useful work during heat exchange. It is defined by two equivalent statements: heat cannot be converted entirely into work from a single source at a constant temperature, and heat cannot spontaneously move from a colder body to a hotter one.
To measure these rules, the concept of entropy was introduced in 1850 by Rudolf Clausius as a mathematical test. In this framework, if heat flows into a reservoir at a constant temperature, the entropy increases. Understanding these principles is vital for biology, as they govern the intricate systems that make life possible.
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Sources
- Summary by Intellect · source: Second Law of Thermodynamics | Biology | Khan Academy
- Also: Second law of thermodynamics | | Britannica
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