AP Chemistry - Full Video Course - What You Need to Know About Entropy - AP Chem Unit 9, Topic 1

Learn AP Chemistry with Mr. Krug! Get the AP Chemistry Ultimate Review Packet: http://www.ultimatereviewpacket.com/courses/chem *Guided notes for these AP Chem videos are now included in the Ultimate Review Packet!* Find them at the start of each unit. If you need help reviewing for your other AP Courses, such as Biology, Physics 1, Environmental Science, Calculus AB, Pre-Calculus, Psychology, Macroeconomics, World History, US History, and more, check out http://www.ultimatereviewpacket.com. #apchemistry #apchem #thermodynamics In this video, Mr. Krug defines entropy and then shows students how to compare the entropies of different systems, based on the state of matter, temperature, and number of molecules present. Finally, he works several examples predicting the sign of ΔS of a balanced chemical equation. 00:00 What Is Entropy? 01:17 Comparing Entropy of Different Systems 07:28 Example Number 1 08:17 Predicting the Sign of ΔS - Practice