How do you know a CHEMICAL REACTION happened? | Chemistry | Chemical vs Physical changes

How do you know if CHEMISTRY is happening? What sort of changes let you know a Chemical Reaction has happened, vs just a Physical change? For instance, you can probably tell ice melting is a physical change - especially because you can reverse it by sticking the water into a freezer and making ice cubes. The water hasn’t changed. Water is still H2O, whether it’s frozen, or liquid, or even gas. But what about something more complicated, like butter? When you melt butter on the stove, at first you just get melted butter. But what about when it browns? Do you know that browning is a special kind of chemical reaction - the MAILLARD reaction? There are other kinds of browning, too, like the DECOMPOSITON reaction that takes place when you melt sugar to make caramel. In this video, we’ll talk about what distinguishes a chemical change from a physical change, and what are some signs to look for so you can tell the difference. To do this, first you’ll need to be able to recognize what is a physical property, vs what is a chemical property of matter. Can you name some physical properties of matter? What about some chemical properties? Here’s a hint - you won’t really observe a chemical property of matter until it is actually taking part in a reaction! 0:00 Intro - How do you know if a Chemical Reaction is Happening? 1:22 Recognizing Physical Properties of Matter 4:15 When a Chemical Reaction HASN'T happened 5:12 What is "browning?" Maillard reaction and decomposition 6:44 Physical Property vs Chemical Property 7:35 List of some chemical properties 8:00 Signs of a chemical reaction 8:50 POP QUIZ - CHEMICAL or PHYSICAL change? Subscribe so you never miss a video! http://bit.ly/SocraticaSubscribe You can also find more Chemistry content on our website https://www.socratica.com/subject/chemistry Want to learn how to be a GREAT STUDENT? We wrote a book for you! How to Be A Great Student https://amzn.to/2Lh3XSP ⊗⊗⊗⊗⊗⊗⊗⊗ If you’d like to learn more chemistry, check out our playlist of videos here: http://bit.ly/Chemistry_Playlist Our most popular videos include: The Periodic Table http://bit.ly/PeriodicTabl History of the Atom http://bit.ly/Atom_History Metals & Metallic Bonding http://bit.ly/Metals_Chemistry Covalent Bonds http://bit.ly/Covalent_Bond Electron Configuration http://bit.ly/eConfig pH http://bit.ly/pHSocratica ⊗⊗⊗⊗⊗⊗⊗⊗ This video was made possible with the generous support of our Patrons on Patreon! You may not realize that making videos on YouTube doesn’t make very much money (each video typically brings in a few dollars each month) - but it does cost money (hundreds of dollars) to make videos (time, studio, equipment, fees for software, etc.). Our patrons *Literally* make it possible for us to continue making these videos free to the world - spreading the gift of education for EVERYONE. Our VIP Patrons include Philip Rice, Colin Negrych, Tracy Karin Prell, Carlos Araujo, Martin Stevens, Vishal Dalal, David Borger, MdeG, Umar Khan, John Krawiec, Timothy M Tapio, Charles Southerland, Deeptanshu Malik, Rob Neal, Eric Eccleston, Michael Shebanow, Alvin Khaled, Nikita Lesnikov, Kavon Johnson, Batou, Daniel Dickman, Gilbert Butler, Edgar Gonzalez, Fred Kingener and Jeremy Shimanek. You can join them here: https://www.patreon.com/socratica If you prefer to make a one-time donation Socratica Paypal https://www.paypal.me/socratica We also accept Bitcoin! :) Our address is: 1EttYyGwJmpy9bLY2UcmEqMJuBfaZ1HdG9 ⊗⊗⊗⊗⊗⊗⊗⊗ Recommended Books: Brown and LeMay Chemistry: The Central Science 13th edition: http://amzn.to/2n5SXtB 14th edition: http://amzn.to/2mHk79f McGraw/Hill Chemistry by Chang & Goldsby http://amzn.to/2mO2khf Uncle Tungsten: Memories of a Chemical Boyhood by Oliver Sacks http://amzn.to/2nlaJp0 Napoleon's Buttons: How 17 Molecules Changed History http://amzn.to/2lJZzO3 ⊗⊗⊗⊗⊗⊗⊗⊗ Written and Produced by Kimberly Hatch Harrison About our instructor: Kimberly Hatch Harrison received degrees in Biology and English Literature from Caltech before working in pharmaceuticals research, developing drugs for autoimmune disorders. She then continued her studies in Molecular Biology (focusing on Immunology and Neurobiology) at Princeton University, where she began teaching as a graduate student. Her success in teaching convinced her to leave the glamorous world of biology research and turn to teaching full-time, accepting a position at an exclusive prep school, where she taught biology and chemistry for eight years. She is now the head writer and producer of Socratica Studios. ⊗⊗⊗⊗⊗⊗⊗⊗ Creative Commons Picture Links Democritus meditating (Museum of Fine Arts of Lyon) https://en.wikipedia.org/wiki/File:Democrite.JPG Author: Jean-Louis Lascoux #Chemistry #ChemicalChange #PhysicalProperty


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