University of Nottingham
Sixty Symbols: Symbols of Physics and Astronomy: Entropy
University of Nottingham scientists explain what entropy is, using real-life examples in order to illustrate this concept on the molecular level. [4:25]
Sophia Learning
Sophia: Entropy and Negentropy: Lesson 3
At the end of this tutorial, the learner will understand the concepts of entropy and negentropy and will understand that systems gradually move towards entropy unless additional energy is introduced to them. It is 3 of 3 in the series...
Bozeman Science
Bozeman Science: Second Law of Thermodynamics
In the following video Paul Andersen explains how the second law of thermodynamics applies to reversible and irreversible processes. In a reversible process the net change in entropy is zero. In and irreversible process the entropy will...
Bozeman Science
Bozeman Science: Entropy
Entropy is simply the dispersion of matter or energy. Paul Andersen begins with a series of video that show the natural direction of processes. According to the second law of thermodynamics the entropy may never decrease in a closed...
Crash Course
Crash Course Physics #23: Thermodynamics
Have you ever heard of a Perpetual Motion Machine? More to the point, have you ever heard of why Perpetual Motion Machines are impossible? One of the reasons is because of the first law of thermodynamics! In this video [10:04] episode of...
Khan Academy
Khan Academy: Chemistry: More Rigorous Gibb's Free Energy
A video lecture that derives the Gibb's free energy equation. The video starts by reviewing what a irreversible and reversible process is with explanations and diagrams. While describing irreversible and spontaneous process the formula...
Khan Academy
Khan Academy: Chemistry: Maxwell's Demon
A video lecture explaining that the Maxwell's "demon" does not contradict the second law of thermodynamics. Video begins by reviewing the second law of thermodynamics which states that the universe tends to move towards more entropy....
Khan Academy
Khan Academy: Chemistry: More on Entropy
A video lecture describing how entropy is a macrostate variable that also describes the number of states a system can take on. The video explains some misconceptions about previous given analogies to describe entropy. [9:30]
Khan Academy
Khan Academy: Chemistry: Proof Entropy Is a Valid State Variable
A video lecture defining a state variable and the characteristics of the value. Understand that to be a valid state variable its value should remained unchanged as it goes around the Carnot cycle. Video shows the math and theory behind...
Khan Academy
Khan Academy: Chemistry: Gibb's Free Energy and Spontaneity
Understand the intuition to why Gibb's free energy equation can predict whether a reaction is spontaneous in this video lecture. The lecture goes through scenarios to show how a reaction may happen spontaneously based on enthalpy,...
Khan Academy
Khan Academy: Chemistry: Thermodynamics and Entropy
A video lecture discussing the definition of entropy as the change of states and as the heat added to the system divided by the temperature added. The video reconciles these two definitions by going through examples to explain how they...
Khan Academy
Khan Academy: Chemistry: A Look at an Incorrect Gibbs/spontaneity Proof
A video lecture exploring how a derivation of the Gibb's free energy equation shown in some textbooks makes an incorrect assumption. The proof defines entropy as an irreversible transfer of heat which is incorrect and causes the basis...
Sophia Learning
Sophia: 2nd Law: Entropy
This lesson will introduce the second law of thermodynamics and define the term entropy, providing examples of entropy.
Crash Course
Crash Course Chemistry #20: Entropy Embrace the Chaos!
In chemistry, entropy is the measure of molecular randomness, or disorder. Listen to this crash course, and embrace the chaos as Hank teaches about entropy. [13:41]
Bozeman Science
Bozeman Science: Second Law of Thermodynamics
Paul Andersen explains how the second law of thermodynamics applies to reversible and irreversible processes. In a reversible process the net change in entropy is zero. In and irreversible process the entropy will always increase in a...
Khan Academy
Khan Academy: Chemistry: Thermodynamic Entropy Definition Clarification
Understand that thermodynamic entropy does not deal with the heat added and the different temperatures at which it is added but rather the reversible heat and temperature to calculate the change in entropy. This video lecture reminds...
Khan Academy
Khan Academy: Chemistry: Entropy Intuition
A video lecture to explain what entropy is and what it isn't. Two definition of entropy are introduced and explored to show how they can be reconciled. Also investigated is the second law of thermodynamics and its relationship to...
Crash Course
Crash Course History of Science #26: Thermodynamics
It's time to heat things up! LITERALLY! It's time for Hank to talk about the history of Thermodynamics!!! It's messy and there are a lot of people who came up with some ideas that worked and others that didn't and then some ideas that...
Khan Academy
Khan Academy: Introduction to Entropy
Introduction to entropy, and how entropy relates to the number of possible states for a system. [7:26]
Khan Academy
Khan Academy: Entropy: Embrace the Chaos
Understand the 2nd Law of Thermodynamics. Disorder is a pretty big deal in the universe and that makes it a pretty big deal in chemistry - it's such a big deal that scientists have a special name for it: entropy. In chemistry, entropy is...
Khan Academy
Khan Academy: Thermodynamic Entropy Definition Clarification
Clarifying that the thermodynamic definition of Entropy requires a reversible system. [15:38]
Khan Academy
Khan Academy: Reconciling Thermodynamic and State Definitions of Entropy
Long video explaining why entropy is a measure of the number of states a system can take on. [28:26]
Khan Academy
Khan Academy: More on Entropy
Distinguishing between microstates and macro states. How entropy S is defined for a system and not for a specific microstate. [8:56]
Khan Academy
Khan Academy: Proof: S (Or Entropy) Is a Valid State Variable
Proof that S or entropy is a valid state variable. [15:38]