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Chemistry expert Kate the Chemist discusses exothermic reactions, PFAS chemicals, ice cream, sugar, fire, and more with Neil deGrasse Tyson and Chuck Nice. Topics include making chemistry fun, chemical reactions, freezing point depression, elements, PFAS impact, and significance of chemistry in society.
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Quick takeaways
- Chemical reactions emit visible light due to electron movements and specific energy levels.
- PFAS chemicals have strong bonds, posing health risks and long-term effects.
Deep dives
Chemical reactions are affected by activation energy
Activation energy is the minimum energy required for a chemical reaction to occur. As atoms rearrange during the reaction, the electrons move and release energy, emitting visible light. For different elements, the color change occurs due to the specific energy levels and light emitted during the reaction.
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