04 Notes - Explosives

04 Notes - Explosives - Aim: W hat role does...

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Aim: What role does thermochemistry play in explosives? QQ: Calculate G for the following equation: ___ CO 2 (g) + ___ H 2 (g) ___ CH 4 (g) + ___ H 2 O (l) Do Now: What values would you expect for H, S, and G for an explosive material? Why? What needs to be taken into consideration when selecting an explosive? Sensitivity Refers to the ease that a material may be ignited or detonated o Impact – how hard can it be hit before exploding? o Friction – can it be scratched without exploding? o Heat – what temperature can the material withstand before exploding? Decomposition of Nitrogen Triiodide 2NI 3 (s) 3I 2 (g)+ N 2 (g) S = + (increase in entropy) H = - (exothermic) G = - (spontaneous) Stability Refers to the ability of an explosive to be stored without deteriorating o Chemical constitution – how much activation energy is needed? A lot “stable” (many composite explosives) A little “liable” (-NO 2 , -ONO 2 , N 3
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This note was uploaded on 01/01/2012 for the course CHEM 101 taught by Professor Donahue during the Spring '11 term at Long Island U..

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04 Notes - Explosives - Aim: W hat role does...

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