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Transcript of Fireworks!
Danielle Tamayo What is a Firework? What Type Of Reaction Occurs? Sparklers Careers Luminescence/incandescence Anatomy of a Firework Safety/Effects Originally a shoot of bamboo- popping sound resulted from heat and air/sap condensed inside Used for religious and recreational purposed world-wide Exothermic Oxidation/Reduction Combustion Luminescence: Electrons absorb energy (unstable state) Incandescence: Light
from heat Luminescence: Red : Li2CO3, SrCO3 Blue: C2H3O2 Green: BaCl Incandescence: Orange: CaCl2, SrOH Yellow: NaNO3, Na3AlF6 White: BaO Purple: Mix of Strontium&
Copper cpds Black Powder: 75% KNO3, 15% charcoal, 10% S Stars: Small, compact balls. Creates sparks and colors. Burns as flies. V.
dangerous Extremely dangerous Warning labels required Pyrotechnicians Adult supervision highly recommended Person responsible for handling pyrotechnics Gunpowder + Paper + Fuse 75% KNO3 - Oxidizer 15% Charcoal - Fuel 10% Sulfur Most common type of firework 2 stages occur subsequently Gunpowder used as a propellent rather than an explosive References: http://www.pbs.org/wgbh/nova/fireworks/ http://www.helium.com/items/1672799-chemistry-of-fireworks Binders - Dextrin dampened by water Reducing Agents - Sulfur Oxidizer Regulators - Metals M. Fuse: Lights 2 fuses(time delay&lift charge), uses electrical current Break: Separate cardboard cmpts. & burst
charge Different Colors http://scifun.chem.wisc.edu/chemweek/fireworks/fireworks.htm http://www.ch.ic.ac.uk/local/projects/gondhia/lightcolour.html http://www.paramountpyrofx.com/launching.asp Understand how to use materials to make exothermic reactions Know what chemicals to be used in diff reactions -Energy released in
form of photon(light) -Blues & Greens -Heated substance
> Brighter glow -Infared > Red >
Orange > Yellow
> White Litter,Acid rain, air
pollution -Carcinogenic sulphur compounds and airborne arsenic in air http://www.webexhibits.org/causesofcolor/4AA.html http://environment.about.com/od/healthenvironment/a/toxicfireworks.htm Deflagration http://www.mnn.com/earth-matters/translating-uncle-sam/stories/are-fireworks-bad-for-the-environment http://humantouchofchemistry.com/fiery-facts-about-firecrackers.htm http://www.chemistryexplained.com/Fe-Ge/Fireworks.html http://www.chemistrydaily.com/chemistry/Deflagration