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Unformatted text preview: Version 363 Quiz 2 laude (51635) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Constants R = 8 . 314 J K 1 mol 1 Definitions Q [C] c [D] d [A] a [B] b Equations G = H- T S G =- RT ln K ln K 2 K 1 = H R parenleftbigg 1 T 1- 1 T 2 parenrightbigg Q = K [at equil.] K w = [H + ][OH ] 001 5.0 points The equilibrium constant of a certain reaction is experimentally determined at 200 K and 250 K and is found to be equal to 10 10 and 10 16 , respectively. What can you say for certain about the reaction? 1. It is endothermic correct 2. It will become non-spontaneous at higher temperatures 3. nothing can be said for certain 4. It is exothermic Explanation: According to the vant Hoff equation, a di- rect proportionality between T and K requires a positive value for H o ....
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- Spring '07