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View full lesson: http://ed.ted.com/lessons/what-is-entropy-jeff-phillipsThere’s a concept that’s crucial to chemistry and physics. It helps explain why phys...
- 5 min
- 4.5M
- TED-Ed
Dec 30, 2013 · Entropy. MIT RES.TLL-004 STEM Concept Videos View the complete course: http://ocw.mit.edu/RES-TLL-004F13 Instructor: John Lienhard This video begins with observations of spontaneous processes...
- 14 min
- 436.9K
- MIT OpenCourseWare
Feb 17, 2020 · What is Entropy in Thermodynamics? 2.9K Likes. 82,860 Views. 2020 Feb 17. In this animated lecture, you will learn about entropy in physics. Also, I will clear the misconceptions about...
- 16 min
- 84.8K
- Najam Academy
Professor Brian Cox explains the concept of entropy and the arrow of time. He uses a pile of sand to explain how entropy is the measure of how many ways in which something can be rearranged.
- Entropy Definition
- Examples of Entropy
- Entropy Equation and Calculation
- Entropy and The Second Law of Thermodynamics
- Entropy and Time
- Entropy and Heat Death of The Universe
- Sources
The simple definition is that entropy is that it is the measure of the disorder of a system. An ordered system has low entropy, while a disordered system has high entropy. Physicists often state the definition a bit differently, where entropy is the energy of a closed system that is unavailable to do work. Entropy is an extensive property of a ther...
Here are several examples of entropy: 1. As a layman’s example, consider the difference between a clean room and messy room. The clean room has low entropy. Every object is in its place. A messy room is disordered and has high entropy. You have to input energy to change a messy room into a clean one. Sadly, it never just cleans itself. 2. Dissolvin...
There are several entropy formulas: Entropy of a Reversible Process Calculating the entropy of a reversible process assumes that each configuration within the process is equally probable (which it may not actually be). Given equal probability of outcomes, entropy equals Boltzmann’s constant (kB) multiplied by the natural logarithm of the number of ...
The second law of thermodynamics states the total entropy of a closed system cannot decrease. For example, a scattered pile of papers never spontaneously orders itself into a neat stack. The heat, gases, and ash of a campfire never spontaneously re-assemble into wood. However, the entropy of one system candecrease by raising entropy of another syst...
Physicists and cosmologists often call entropy “the arrow of time” because matter in isolated systems tends to move from order to disorder. When you look at the Universe as a whole, its entropy increases. Over time, ordered systems become more disordered and energy changes forms, ultimately getting lost as heat.
Some scientists predict the entropy of the universe eventually increases to the point useful work becomes impossible. When only thermal energy remains, the universe dies of heat death. However, other scientists dispute the heat death theory. An alternative theory views the universe as part of a larger system.
Atkins, Peter; Julio De Paula (2006). Physical Chemistry(8th ed.). Oxford University Press. ISBN 978-0-19-870072-2.Chang, Raymond (1998). Chemistry(6th ed.). New York: McGraw Hill. ISBN 978-0-07-115221-1.Clausius, Rudolf (1850). On the Motive Power of Heat, and on the Laws which can be deduced from it for the Theory of Heat. Poggendorff’s Annalen der Physick, LXXIX (Dover Reprint). ISBN 978-0-486-5...Landsberg, P.T. (1984). “Can Entropy and “Order” Increase Together?”. Physics Letters. 102A (4): 171–173. doi:10.1016/0375-9601(84)90934-4There’s a concept that’s crucial to chemistry and physics. It helps explain why physical processes go one way and not the other: why ice melts, why cream spreads in coffee, why air leaks out of a punctured tire. It’s entropy, and it’s notoriously difficult to wrap our heads around.
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Dec 6, 2022 · Show students this video job profile of project leader, Stuart McDonald, and highlight the importance of chemistry in research and development. Assess your learners’ understanding of key definitions, entropy, Gibbs free energy and more with the Thermodynamics starter for 10.
