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- DictionaryEn·tro·py/ˈentrəpē/
noun
- 1. a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system: "the second law of thermodynamics says that entropy always increases with time"
- 2. lack of order or predictability; gradual decline into disorder: "a marketplace where entropy reigns supreme"
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 ...
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 of wood can be burned, but cannot be "unburned".
Sep 12, 2022 · Calculate the change of entropy for some simple processes. 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.
The second law of thermodynamics states that the total entropy of a system either increases or remains constant in any spontaneous process; it never decreases. An important implication of this law is that heat transfers energy spontaneously from higher- to lower-temperature objects, but never spontaneously in the reverse direction.
First it’s helpful to properly define entropy, which is a measurement of how dispersed matter and energy are in a certain region at a particular temperature. Since entropy is primarily dealing with energy, it’s intrinsically a thermodynamic property (there isn’t a non-thermodynamic entropy).
19: Chemical Thermodynamics. 19.2: Entropy and the Second Law of Thermodynamics. Expand/collapse global location. 19.2: Entropy and the Second Law of Thermodynamics. Page ID. Learning Objectives. To understand the relationship between internal energy and entropy.
More on entropy (video) | Thermodynamics | Khan Academy. Science > Physics library > Thermodynamics > Laws of thermodynamics. More on entropy. Google Classroom. About. Transcript. Distinguishing between microstates and macro states. How entropy S is defined for a system and not for a specific microstate. Created by Sal Khan. Questions.
