Final MC practice questions.pdf - CHEM 1380B-MC practice...

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CHEM 1380B- MC practice questions 1 Chapter 5, 19 Thermochemistry & Chemical Thermodynamics 1) A ________ ΔH corresponds to an ________ process. A) negative, endothermic B) positive, exothermic C) positive, endothermic D) zero, exothermic E) zero, endothermic Answer: C 2) Given the following reactions N 2 (g) + 2O 2 (g) 2NO 2 (g ) ΔH = 66.4 kJ 2NO (g) + O 2 (g) 2NO 2 (g) ΔH = -114.2 kJ the enthalpy of the reaction of the nitrogen to produce nitric oxide N 2 (g) + O 2 (g) 2NO (g) is ________ kJ. 3) The value of ΔH° for the reaction below is -6535 kJ. ________ kJ of heat are released in the combustion of 16.0 g of C 6 H 6 (l)? 2C 6 H 6 (l) + 15O 2 (g) 12CO 2 (g) + 6 H 2 O (l) 4) Given the data in the table below, ΔH° for the reaction 2CO (g) + O 2 (g) 2CO 2 (g) is ________ kJ.
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CHEM 1380B- MC practice questions 2 5) When a system is at equilibrium, ________. A) the reverse process is spontaneous but the forward process is not B) the forward and the reverse processes are both spontaneous C) the forward process is spontaneous but the reverse process is not D) the process is not spontaneous in either direction E) both forward and reverse processes have stopped Answer: D 6) ΔS is positive for the reaction ________. 7) For the reaction 2 C 4 H 10 (g) + 13 O 2 (g) 8 CO 2 (g) + 10 H 2 O (g) ΔH° is -125 kJ/mol and ΔS° is +253 J/K ∙ mol. This reaction is ________.
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1) What is the order of the reaction with respect to ClO 2 ?
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