hw10solution_pdf - So (dds785) Homework 10 Sutcliffe...

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Unformatted text preview: So (dds785) Homework 10 Sutcliffe (52440) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. This is the LAST homework!! 001 10.0 points NOTE: In this question the equation is assum- ing you INCLUDE the 1/a term for species A. Consider the reaction 2 NO 2 (g) + F 2 (g) 2 NO 2 F(g) rate =- [F 2 ] t . What is another form of the rate of the reaction? 1.- [NO 2 ] t 2.- 2 [NO 2 ] t 3. [NO 2 F] t 4. [NO 2 F] 2 t correct 5. [NO 2 ] 2 t Explanation: 002 10.0 points Consider the concentration-time dependence graph for two first-order reactions. [A] Molar Concentration of Reactant Concentration- Time- Which reaction has the larger rate con- stant? 1. the reaction represented by the upper curve 2. Unable to determine 3. the reaction represented by the lower curve correct Explanation: 003 (part 1 of 2) 10.0 points For BOTH the next questions you MUST consider the 1/a term in the rate equation for species A, etc. A unique rate means average rate taking into account the stoi- chiometric coefficients. In the reaction 3 ClO (aq) 2 Cl (aq) + ClO 3 (aq) the rate of reaction of Cl is 3 . 6 mol L min . What is the rate of reaction of ClO ? 1. 5 . 4 mol L min correct 2. 10 . 8 mol L min 3. . 9 mol L min 4. 2 . 7 mol L min 5. 1 . 8 mol L min Explanation: rate of change of [ClO ] = parenleftbigg 3 . 6 mol Cl L min parenrightbiggparenleftbigg 3 mol ClO 2 mol Cl parenrightbigg = 5 . 4 mol L min 004 (part 2 of 2) 10.0 points What is the unique rate of the reaction? 1. 2 . 7 mol L min So (dds785) Homework 10 Sutcliffe (52440) 2 2. . 9 mol L min 3. 1 . 8 mol L min correct 4. 5 . 4 mol L min 5. 10 . 8 mol L min Explanation: The unique rate is given by rate of change g species coefficient g species For this reaction the unique rate is 1 2 parenleftbigg 3 . 6 mol L min parenrightbigg = 1 . 8 mol L min 005 10.0 points If the rate of reaction increases by a factor of 2.3 when the concentration of reactant in- creases by a factor of 1.5, what is the order of the reaction with respect to this reactant?...
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hw10solution_pdf - So (dds785) Homework 10 Sutcliffe...

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