HW 11 - Wright Jacqueline – Homework 11 – Due Dec 5 2007 11:00 pm – Inst James Holcombe 1 This print-out should have 28 questions

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Unformatted text preview: Wright, Jacqueline – Homework 11 – Due: Dec 5 2007, 11:00 pm – Inst: James Holcombe 1 This print-out should have 28 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points For a reaction that is zero-order overall, 1. the activation energy is zero. 2. the rate constant is zero. 3. the rate does not change during the reac- tion. 4. the reactant concentration does not change with time. 002 (part 1 of 1) 10 points The rate of the reaction 2O 3 → 3O 2 is equal to 1.- Δ[O 2 ] Δ t . 2.- 1 2 Δ[O 3 ] Δ t . 3.- Δ[O 3 ] Δ t . 4.- 1 3 Δ[O 2 ] Δ t . 5. + 1 2 Δ[O 3 ] Δ t . 003 (part 1 of 1) 10 points When we speak of the rate of a reaction, we are referring to 1. the maximum rate. 2. the instantaneous rate. 3. the average rate. 4. the minimum rate. 5. the integrated rate. 004 (part 1 of 1) 10 points Consider the elementary reaction H + Br 2 → HBr + Br The rate of production of HBr would be reliably aproximated as simple first order if 1. first order will never be a good approxi- mation. 2. [H] is large and [Br 2 ] is large. 3. [H] and [Br 2 ] are about equal. 4. [H] is small and [Br 2 ] is small. 5. [H] is small and [Br 2 ] is large. 005 (part 1 of 1) 10 points Consider the reaction 2NO 2 (g) + F 2 (g) → 2NO 2 F(g) rate =- Δ[F 2 ] Δ t . What is another form of the rate of the reaction? 1. Δ[NO 2 ] 2Δ t 2. Δ[NO 2 F] 2Δ t 3. Δ[NO 2 F] Δ t 4.- Δ[NO 2 ] Δ t 5.- 2Δ[NO 2 ] Δ t 006 (part 1 of 1) 10 points For the reaction 2NO(g) + 2H 2 (g) → N 2 (g) + 2H 2 O(g) Wright, Jacqueline – Homework 11 – Due: Dec 5 2007, 11:00 pm – Inst: James Holcombe 2 the following data were collected. [NO(g)] [H 2 (g)] Rate, M/s 0.10 0.10 0.0050 0.10 0.20 0.010 0.10 0.30 0.015 0.20 0.10 0.020 0.20 0.20 0.040 What is the rate law for this reaction? 1. None of these 2. rate = k [H 2 ][NO] 2 3. rate = k [H 2 ] [NO] 4. rate = k [H 2 ][NO] 5. rate = k [H 2 ] [NO] 2 6. rate = k [H 2 ] 2 [NO] 007 (part 1 of 3) 10 points Manganate ions (MnO 2- 4 ) react at 2.0 mol L · min in acidic solution to form per- manganate ions and manganese(IV) oxide: 3 MnO 2- 4 (aq) + 4 H + (aq) → 2 MnO- 4 (aq) + MnO 2 (s) + 2 H 2 O( ‘ ) What is the rate of formation of perman- ganate ions?...
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This note was uploaded on 12/08/2008 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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HW 11 - Wright Jacqueline – Homework 11 – Due Dec 5 2007 11:00 pm – Inst James Holcombe 1 This print-out should have 28 questions

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