CHEM 1A03 Lecture Notes - Lecture 9: Sodium Azide, Ammonium Nitrate, Potassium Nitrate

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: Lydia Chen

Document Summary

Deta g less than 0, ---spontaneous reaction: delta h less than zero, and delta s greater than zero. Comparing entropy of different compounds, the one with the greatest entropy . : greatest number of atoms, molecular weight or greatest number of electrons. Entropy change in a chemical reaction, increases with: solide-gaseous state, more randomness in the compounds, (most random to least: gas, Air bags the solid sodium is highly reactive something else needed to neutralize the effect of sodium. ----potassium nitrate sodium oxide produced (basic), highly reactive, something else needed, Ammonium nitrate is another substitution for sodium azide: not stable, triggers the explosion of air bag without accidents occur, under certain temperature and humidity, used in explosives. However, save more lives than kills and injuries. It explodes when you touch it: purple gas, example of spontaneous reaction, the triple bond in n2 is the driving force increasing entropy when adding solid to water, highest solubility, greatest number of ions.