230_W11_L18 - CHEM 230 W11 Lecture 18 Chapter 9: Stress and...

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CHEM 230 W11 Lecture 18 Chapter 9: Stress and Response 1) Temperature and K 2) Evaluating a Response to Stress 3) Hidden Stresses
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Concept Question C (s, graphite) + S 2(g) ↔ CS 2(g) a) Equilibrium is established by placing S 2(g) and C (s,graphite) together in a closed system. Once equilibrium is established, will the amount of graphite in the system be the same, more, or less at equilibrium than it was initially? b) The system initially contains pure CS 2(g) and graphite and is allowed to reach equilibrium. Will the amount of graphite in the system be the same, more, or less at equilibrium than it was initially? A) a) g C (s, graphite) stay same; b) g C (s,graphite) stay same B) a) g C (s,graphite) goes down; b) g C (s,graphite) stay same C) a) g C (s, graphite) goes down; b) g C (s, graphite) goes down D) a) g C (s,graphite) goes down; b) g C (s,graphite) goes up
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Concept Question C (s,graphite) + S 2(g) ↔ CS 2(g) a) Equilibrium is established by placing S 2(g) and C (s,graphite) together in a closed system. Once equilibrium is established, will the amount of graphite in the system be the same, more, or less at equilibrium than it was initially? b) The system initially contains pure CS 2(g) and graphite and is allowed to reach equilibrium. Will the amount of graphite in the system be the same, more, or less at equilibrium than it was initially? A) a) g C (s,graphite) stay same; b) g C (s,graphite) stay same B) a) g C (s,graphite) goes down; b) g C (s,graphite) stay same C) a) g C (s,graphite) goes down; b) g C (s,graphite) goes down A) a) g C (s,graphite) goes down; b) g C (s,graphite) goes up
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I 2(s) I 2(g) H > 0 “heat” + I 2(s) I 2(g) Cold: Warm: more solid more gas bulb lighter darker purple lower K higher K For an endothermic reaction ( ΔHº > 0 ): Temperature increases favor the products ( K larger) Temperature decreases favor the reactants ( K smaller) K = P I 2( g )
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This note was uploaded on 02/18/2011 for the course CHEMISTRY 230 taught by Professor Gottfried during the Spring '10 term at University of Michigan.

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230_W11_L18 - CHEM 230 W11 Lecture 18 Chapter 9: Stress and...

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