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Molecules Reactions of the week: fireworks !

Molecules Reactions of the week: fireworks !. Fireworks work because of redox chemistry. 1) explosions give off heat and gas, which propel the rocket up and the “stars” out 2) colors occur due to heating and excitation of various elements Some types of fireworks: palm fountain

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Molecules Reactions of the week: fireworks !

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  1. Molecules Reactions of the week: fireworks! Fireworks work because of redox chemistry • 1) explosions give off heat and gas, which propel the rocket up and the “stars” out • 2) colors occur due to heating and excitation of various elements • Some types of fireworks: • palm • fountain • rondell • carnation

  2. Fireworks!Explosions : Oxidizers (generates O2, the oxidizing agent) 2KNO3 2KNO2 + O2 KClO4 KCl + 2O2 Reducing agents (also called fuel!) S(s), C (s), Al (s), Fe (s), etc. Colors: due to electronic excitation of elements (each element has a different emission wavelength, so different colors) Compound Color wavelength SrCO3, SrCl red 600-646 nm CaCl orange 591-608 nm Na anything yellow 589 nm BaCO3, BaCl green 511-533 nm CuCl blue 403-456 nm

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