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Neil deGrasse Tyson x Kate the Chemist Answer Chemistry Questions

What is chemistry? Neil deGrasse Tyson and comedian Chuck Nice take fan questions on exothermic reactions, PFAS, ice cream, sugar, fire, and more with Kate Biberdorf, aka Kate the Chemist. Fundamentally, what is a chemical reaction? Kate breaks down the basis of chemistry, how it overlaps with thermodynamics, and exo- versus endothermic reactions. Why is Gallium a liquid in the US but listed as a solid in the UK? Plus, Kate schools Neil on how adding salt to ice can help you make homemade ice cream. If hydrogen and oxygen are both flammable, why isn’t water super flammable? We discuss how chemists predict a molecule’s properties. Learn about activation energy and how elements manage to even bond with each other. We break down combustion reactions and why sugar gets hard when you heat it to a certain temperature. Are PFAS as dangerous as we think they are? We explain what PFAS are and what makes them problematic for our health. What gives colors to the elements? We talk about quantum dots, visible light, and what happens when you put sodium in water. All that, plus, what makes oxygen so special?

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