Entropy - Wikipedia
网页Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty.
What Is Entropy? Definition and Examples - Science Notes and …
网页2021年11月28日 · Entropy is defined as a measure of a system’s disorder or the energy unavailable to do work. Entropy is a key concept in physics and chemistry, with application in other disciplines, including cosmology, biology, and economics. In physics, it is part of thermodynamics. In chemistry, it is part of physical chemistry.
Entropy Definition & Meaning - Merriam-Webster
网页The meaning of ENTROPY is a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder, that is a property of the system's state, and that varies directly with any reversible change in heat in the system and inversely with the temperature of the system; broadly ...
Entropy: The Invisible Force That Brings Disorder to the Universe
网页2023年11月30日 · The Definition of Disorder. It's harder than you'd think to find a system that doesn't let energy out or in — our universe is a good example of that — but entropy describes how disorder happens in a system as large as the universe or as small as a thermos full of coffee.
Entropy | Definition & Equation | Britannica
网页2024年9月14日 · Entropy, the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, entropy is also a measure of the molecular disorder, or randomness, of a system.
Introduction to entropy - Wikipedia
网页In thermodynamics, entropy is a numerical quantity that shows that many physical processes can go in only one direction in time. For example, cream and coffee can be mixed together, but cannot be "unmixed"; a piece …
12.3 Second Law of Thermodynamics: Entropy - Physics - OpenStax
网页Entropy is a measure of the disorder of a system. Entropy also describes how much energy is not available to do work. The more disordered a system and higher the entropy, the less of a system's energy is available to do work.
4.7: Entropy - Physics LibreTexts
网页The second law of thermodynamics is best expressed in terms of a change in the thermodynamic variable known as entropy, which is represented by the symbol S. Entropy, like internal energy, is a state function.
What Is Entropy? Entropy Definition and Examples - ThoughtCo
网页2024年9月7日 · Entropy is the measure of the disorder of a system. It is an extensive property of a thermodynamic system, meaning its value changes depending on the amount of matter present. In equations, entropy is usually denoted by the letter S and has units of joules per kelvin (J⋅K −1) or kg⋅m 2 ⋅s −2 ⋅K −1. A highly ordered system has low ...
Entropy: Why Life Always Seems to Get More Complicated
网页Entropy provides a good explanation for why Murphy’s Law seems to pop up so frequently in life. There are more ways things can go wrong than right. The difficulties of life do not occur because the planets are misaligned or because …