Homework 11

Homework 11 - Gadhia Tejas Homework 11 Due Dec 5 2007 11:00...

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Gadhia, Tejas – 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 – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points ±or a reaction that is zero-order overall, 1. the reactant concentration does not change with time. 2. the rate constant is zero. 3. the rate does not change during the reac- tion. 4. the activation energy is zero. 002 (part 1 oF 1) 10 points The rate oF the reaction 2 O 3 3 O 2 is equal to 1. - 1 3 Δ[O 2 ] Δ t . 2. - Δ[O 2 ] Δ t . 3. - Δ[O 3 ] Δ t . 4. + 1 2 Δ[O 3 ] 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 average rate. 2. the maximum rate. 3. the integrated rate. 4. the minimum rate. 5. the instantaneous 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 frst order iF 1. [H] is small and [Br 2 ] is small. 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 large. 5. frst order will never be a good approxi- mation. 005 (part 1 oF 1) 10 points Consider the reaction 2 NO 2 (g) + ± 2 (g) 2 NO 2 ±(g) rate = - Δ[± 2 ] Δ t . What is another Form oF the rate oF the reaction? 1. - Δ[NO 2 ] Δ t 2. Δ[NO 2 ±] Δ t 3. - 2 Δ[NO 2 ] Δ t 4. Δ[NO 2 ] 2 Δ t 5. Δ[NO 2 ±] 2 Δ t 006 (part 1 oF 1) 10 points ±or the reaction 2 NO(g) + 2 H 2 (g) N 2 (g) + 2 H 2 O(g)

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Gadhia, Tejas – 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? 1. 1 . 8 mol L · min 2. 5 . 4 mol L · min 3. 0 . 9 mol L · min 4. 10 . 8 mol L · min 5. 1 . 3 mol L · min 008 (part 2 of 3) 10 points What is the rate of reaction of H + (aq)?
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Homework 11 - Gadhia Tejas Homework 11 Due Dec 5 2007 11:00...

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