lecture41_chem110_sas

lecture41_chem110_sas - Chemical Reactions Equilibrium Part...

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Unformatted text preview: Chemical Reactions: Equilibrium Part 2 CH110 FA11 SAS 1 FINAL EXAM Monday, Dec. 12 th , 2:30 PM Prepare for Recitation December 8 th ALEKS Objective 14 due SUNDAY December 4 th ANGEL Quiz 14, December 8 th ALEKS FINAL ASSESSMENT: Deadline December 9 th Lecture 40: November 30 th Lecture 41: December 2 nd Lecture 42: December 5 th Read: Ch. 15.1 – 15.5 HW Preparation: BLB 15: 21,28,29,32,35,46; Packet 15: 1-10 CH110 FA11 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? Heterogeneous Equilibrium CH110 FA11 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 = Practice with Heterogeneous Equilibria...
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This note was uploaded on 01/18/2012 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Penn State.

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lecture41_chem110_sas - Chemical Reactions Equilibrium Part...

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