E115_Problem_Set_22 - e 115 Engineering Thermodynamics...

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e 115 Engineering Thermodynamics Fall 2009 University of California Problem set 22 Due: Wednesday, November 11 th . There will be no penalty for problem sets submitted by November 13, in lecture. 1. ( 20 points ) A natural question regarding chemical reactions is to understand if the initial conditions will effect the final composition of the system at equilibrium. This issue is considered in this problem. We consider the following reaction: A 2 ( g ) + B 2 ( g ) = 2 AB( g ) Assume that this reaction is taking place at 1000 K, and that the standard free energy of reaction is –5000 joules per mole of AB( g ) produced. We consider three different sets of initial conditions, designated I, II, and III, and for which the initial number of moles of A 2 , B 2 , and AB are designated as n A 2 ( initial ) , n B 2 ( initial ) , and n AB ( initial ) , respectively: n A 2 ( initial ) n B 2 ( initial ) n AB ( initial ) Condition I 1 1 0 Condition II 0.5 0.5 1 Condition III 1.33 0.67 0 a) Starting from the expression for
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This note was uploaded on 02/12/2011 for the course E 115 taught by Professor Staff during the Fall '08 term at University of California, Berkeley.

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E115_Problem_Set_22 - e 115 Engineering Thermodynamics...

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