light producing chemical reactions presentation
DESCRIPTION
CHEM 1202 Extra Credit Assignment High School Level Chemistry Demonstration on Light Producing Chemical Reactions. Presented at Assumption High School, Napoleonville, Louisiana on Friday, May 18, 2012.TRANSCRIPT
![Page 1: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/1.jpg)
Light Producing Chemical Reactions
Matthew Landry CHEM 1202 – General Chemistry II
Spring Intersession 2012
![Page 2: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/2.jpg)
What is Light?
• The natural agent that stimulates sight and makes things visible
• Electromagnetic radiation from about 390
to 740 nm in wavelength.
![Page 3: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/3.jpg)
Part I: Chemiluminescence
• Certain organic chemical reactions can produce light either by luminescence or phosphorescence.
• Firefly • Chemical reactions that release energy that is efficiently converted to light, but almost no heat.
![Page 4: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/4.jpg)
Part II: Quantum Fireballs
• Lithium (Li) • Sodium (Na) • Potassium (K) • Calcium (Ca) • Strontium (Sr) • Copper (Cu)
• Fireworks and Pyrotechnics
![Page 5: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/5.jpg)
Part II: Quantum Fireballs
• General Reaction M+n ion + Heat Energy à {M+n excited state} à M+n + Light Emitted
![Page 6: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/6.jpg)
Part II: Quantum Fireballs
Each metal has its own light emission profile, due to the differences of electron orbital energies unique to that element.
![Page 7: Light Producing Chemical Reactions Presentation](https://reader034.vdocuments.us/reader034/viewer/2022051117/568bd34c1a28ab2034909d3e/html5/thumbnails/7.jpg)
Part III: Burning Mg in CO2
• Fire extinguishers • The heat produced by this reaction
which begins in the open atmosphere is sufficient to decompose the CO2.
Mg(s) + CO2 à MgO (s) + C(s)