https://www.khanacademy.org/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/v/introduction-to-entropy 2021-10-06T19:08:53.089656177Z Introduction to entropy Introduction to entropy, and how entropy relates to the number of possible states for a system. video https://cdn.kastatic.org/googleusercontent/T6WXdV7LynXhhaIjNssG7ANT6yLOJpLwDKkyxIwi3tofD46b47esmMOau0loXGTfMVASTyoGklDvR5BULPDzwOPm Introduction to entropy Introduction to entropy, and how entropy relates to the number of possible states for a system. https://cdn.kastatic.org/ka-youtube-converted/Svvr5uF_FZ8.mp4/Svvr5uF_FZ8.mp4 447 Entropy and the disorder of energy in natural processes https://www.khanacademy.org/science/grade-11-physics-snc-aligned/x1d0fed5276339e80:heat-and-thermodynamics/x1d0fed5276339e80:entropy-and-the-disorder-of-energy-in-natural-processes/e/gibb-s-free-energy-and-entropy 2025-05-14T05:31:01.421518925Z Entropy changes (Basic) Let's solve a few problems to calculate the understand what process decrease or increase entropy and how! Aanchal Arora exercise https://www.khanacademy.org/science/ap-biology/cellular-energetics/cellular-energy/v/second-law-of-thermodynamics-and-entropy 2023-05-02T21:08:26.186654054Z Second Law of Thermodynamics and entropy Entropy is a measure of disorder or randomness in a system. It represents the number of possible states or configurations that a system can take on. According to the Second Law of Thermodynamics, entropy tends to increase over time, meaning that systems naturally progress towards a more disordered or random state. video https://cdn.kastatic.org/googleusercontent/ppieV8AlxHEaQH6o-oTIgZmW6ODor107nEd5kVzcWU0Fw-gmgRG5BnHn65VJgVSO551-BqD2KXLIAMkRviyDwzE Second Law of Thermodynamics and entropy Entropy is a measure of disorder or randomness in a system. It represents the number of possible states or configurations that a system can take on. According to the Second Law of Thermodynamics, entropy tends to increase over time, meaning that systems naturally progress towards a more disordered or random state. https://cdn.kastatic.org/ka-youtube-converted/axG9HuqViDY.mp4/axG9HuqViDY.mp4 512 Entropy and the disorder of energy in natural processes https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:applications-of-thermodynamics/x2eef969c74e0d802:entropy/e/entropy 2026-03-11T21:40:48.828994006Z Entropy Check your understanding of entropy changes in physical and chemical processes in this set of free practice questions designed for AP Chemistry students. exercise https://www.khanacademy.org/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/v/why-heat-increases-entropy 2021-03-18T10:33:22Z Why heat increases entropy Why heat increases entropy—even though some of it can do work! video https://cdn.kastatic.org/googleusercontent/6yla8udTl6kYbpvH9LtznrI-VqYIQa7ogZLTq8VyHn2k5rXNDm1gS2FoS2_-c7d-6d7s25E01ZTUrl4wu2nvDYw9 Why heat increases entropy Why heat increases entropy—even though some of it can do work! https://cdn.kastatic.org/ka-youtube-converted/cKAF1v5hJoE.mp4/cKAF1v5hJoE.mp4 421 Entropy and the disorder of energy in natural processes https://www.khanacademy.org/science/grade-11-physics-snc-aligned/x1d0fed5276339e80:heat-and-thermodynamics/x1d0fed5276339e80:entropy-and-the-disorder-of-energy-in-natural-processes/v/entropy-intuition 2021-01-04T18:35:19Z Entropy intuition Introduces second law of thermodynamics. A discussion of entropy change in terms of heat and microstates . Sal Khan video https://cdn.kastatic.org/googleusercontent/grVnyR9fXAbGU4Mb6UGGJouvDcaxIniqgC1SJWZZTVr9TYKiV0tfHS4qaTlC0vH0ECp1hEGb9o6HKGne0h6kRQOt Entropy intuition Introduces second law of thermodynamics. A discussion of entropy change in terms of heat and microstates . https://cdn.kastatic.org/ka-youtube-converted/xJf6pHqLzs0.mp4/xJf6pHqLzs0.mp4 1155 Entropy and the disorder of energy in natural processes https://www.khanacademy.org/science/grade-11-physics-snc-aligned/x1d0fed5276339e80:heat-and-thermodynamics/x1d0fed5276339e80:entropy-and-the-disorder-of-energy-in-natural-processes/v/more-on-entropy 2021-01-04T18:35:19Z More on entropy Distinguishing between microstates and macro states. How entropy S is defined for a system and not for a specific microstate. Sal Khan video https://cdn.kastatic.org/googleusercontent/Sp1EWo5F7C3hMtrEi5xN0W95TWCL-Tvj-0uJoWpJp13U8m__nFgI_F7AWi3-qPdPivSOLE71zZ2cFfQug3b1ZvQX More on entropy Distinguishing between microstates and macro states. How entropy S is defined for a system and not for a specific microstate. https://cdn.kastatic.org/ka-youtube-converted/dFFzAP2OZ3E.mp4/dFFzAP2OZ3E.mp4 536 Entropy and the disorder of energy in natural processes https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:applications-of-thermodynamics/x2eef969c74e0d802:entropy/v/absolute-entropy-and-entropy-change 2022-10-05T02:43:18.611402953Z Absolute entropy and entropy change The standard molar entropy of a substance is the absolute entropy of 1 mole of the substance in the standard state. For any chemical reaction, the standard entropy change is the sum of the standard molar entropies of the products minus the sum of the standard molar entropies of the reactants. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/2ccb4e70-a7f3-421f-b344-da0b30119767_1280_720_base.png Absolute entropy and entropy change The standard molar entropy of a substance is the absolute entropy of 1 mole of the substance in the standard state. For any chemical reaction, the standard entropy change is the sum of the standard molar entropies of the products minus the sum of the standard molar entropies of the reactants. https://cdn.kastatic.org/ka-youtube-converted/ObridY7EHyk.mp4/ObridY7EHyk.mp4 688 Entropy and the disorder of energy in natural processes