lecture41_chem110_sas

lecture41_chem110_sas - Chemical Reactions: Equilibrium...

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Chemical Reactions: Equilibrium Part 2 CH110 FA10 SAS 1 FINAL EXAM Monday, Dec. 13 th , 10:10-Noon Final Chance for SCT Credit! Monday, December 6 th by Midnight Prepare for Recitation December 9th Homework due December 7 th Quiz due December 9 th Lecture 40: December 1 st Lecture 41: December 3 rd Lecture 42: December 6 th Read: Ch. 15.1 – 15.5 HW Preparation: BLB 15: 13,14,21,27,28,29,30,32,35,37,39,46; Packet 15: 1-10
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CH110 FA10 SAS 2 By the end of Today’s Lecture you should know: Homogeneous/Heterogeneous Equilibria Magnitude of the Equilibrium Constant Keq Calculations involving K eq Predicting the direction of a reaction using Q KEY QUESTIONS: THE BIG PICTURE Chemical Reactions: Equilibrium Part 2 Do real reactions always proceed to completion? What forces drive the reaction process? How do the properties of heterogeneous reactions differ from homogeneous? Remember: macroscopic properties come from microscopic origins What is the meaning of chemical equilibrium? How does the equilibrium constant help explain the extent of a reaction? What is the relationship between various equilibrium constant expressions?
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Heterogeneous Equilibrium CH110 FA10 SAS 3 Heterogeneous equilibrium: reactants and products are in more than one phase What is K eq ? K eq ' = 3 Fe(s) + 4 H 2 O(g) Fe 3 O 4 (s) + 4 H 2 (g) But, what is [Fe] and [Fe 3 O 4 ] ? They are _________ and put into the equilibrium constant (BUT, Fe(s) must be _________ for equilibrium to occur) So, the correct K eq is: K eq = Leave solids and pure liquids ______ equilibrium constant expressions K eq =
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lecture41_chem110_sas - Chemical Reactions: Equilibrium...

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