Khan Academy
Entropy Intuition, Thermodynamics, Physics
Sal provides two definitions for entropy: the thermodynamic definition and the mathematical definition. Entropy and the 2nd Law of Thermodynamics are the focus of this chemistry video. The law states that the change in entropy in the...
Khan Academy
More on Entropy, Thermodynamics, Physics
Entropy is the focus of this chemistry video. More specifically, Sal drives home the point that entropy is a macroscopic state variable. This means that a change in the universe's entropy must always be positive, because when heat is...
Khan Academy
Thermodynamic Entropy Definition Clarification, Physics
In the previous video, Sal introduced students to entropy and the 2nd Law of Thermodynamics. An example he used had a couple of points that were factual, but not clear to many students. In this video, he goes over those points again in...
Curated OER
STEMbite: Entropy of the Playroom
Here is a darling demonstration of the second law of thermodynamics. Entropy has increased in a toddler's playroom as he removed toys and books off shelves and left them on the floor when he moved to the next activity. Yes, microscopic...