Consider the general reaction: 5Br¯(aq) + BrO3¯(aq) + 6H+(aq) $\rightarrow$ 3Br2(aq) + 3H2O(aq) For this reaction, the rate when expressed as $\Delta$[Br2]/$\Delta$t is the same as:

A) -$\Delta$[H2O]/$\Delta$t B) 3$\Delta$[BrO3¯]/$\Delta$t C) -5$\Delta$[Br¯]/$\Delta$t D) -0.6$\Delta$[Br¯]/$\Delta$t E) None of these choices is correct. A) -$\Delta$[H2O]/$\Delta$t B) 3$\Delta$[BrO3¯]/$\Delta$t C) -5$\Delta$[Br¯]/$\Delta$t D) -0.6$\Delta$[Br¯]/$\Delta$t E) None of these choices is correct.

Consider this reaction: 2NH3(g) $\rightarrow$N2(g) + 3H2(g) If the rate $\Delta$[H2]/$\Delta$t is 0.030 mol L¯1 s¯1, then $\Delta$[NH3]/$\Delta$t is:

A) -0.045 mol L¯1 s¯1 B) -0.030 mol L¯1 s¯1 C) -0.020 mol L¯1 s¯1 D) -0.010 mol L¯1 s¯1 E) None of these choices is correct. A) -0.045 mol L¯1 s¯1 B) -0.030 mol L¯1 s¯1 C) -0.020 mol L¯1 s¯1 D) -0.010 mol L¯1 s¯1 E) None of these choices is correct.

Sulfuryl chloride, SO2Cl2(g), decomposes at high temperature to form SO2(g) and Cl2(g). The rate constant at a certain temperature is 4.68 *10¯5s¯1. What is the order of the reaction?

A) zero B) first C) second D) third E) More information is needed to determine the order. A) zero B) first C) second D) third E) More information is needed to determine the order.

Ammonium cyanate (NH4CNO) reacts to form urea (NH2CONH2). At 65 $\degree$C, the rate constant, k, is 3.60 L mol¯1s¯1. What is the rate law for this reaction?

A) Rate = 3.60 L mol¯1s¯1[NH4CNO] B) Rate = 3.60 L mol¯1s¯1[NH4CNO]2 C) Rate = 0.28 mol L¯1s¯1[NH4CNO] D) Rate = 0.28 mol L¯1s¯1[NH4CNO]2 E) Rate = 3.60 L mol¯1s¯1[NH2CONH2]¯1 A) Rate = 3.60 L mol¯1s¯1[NH4CNO] B) Rate = 3.60 L mol¯1s¯1[NH4CNO]2 C) Rate = 0.28 mol L¯1s¯1[NH4CNO] D) Rate = 0.28 mol L¯1s¯1[NH4CNO]2 E) Rate = 3.60 L mol¯1s¯1[NH2CONH2]¯1

Exam 16: Kinetics: Rates and Mechanisms of Chemical Reactions

Consider the general reaction: 5Br¯(aq) + BrO₃¯(aq) + 6H⁺(aq) $\rightarrow$ 3Br₂(aq) + 3H₂O(aq) For this reaction, the rate when expressed as $\Delta$ [Br₂]/ $\Delta$ t is the same as:

(Multiple Choice)

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Question 61

Consider this reaction: 2NH₃(g) $\rightarrow$ N₂(g) + 3H₂(g) If the rate $\Delta$ [H₂]/ $\Delta$ t is 0.030 mol L¯¹ s¯¹, then $\Delta$ [NH₃]/ $\Delta$ t is:

(Multiple Choice)

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Question 62

A boiled egg can be cooked at 100.0 $\degree$ C in exactly 5 minutes. At an altitude of around 2000 m where the boiling point of water is 93.0 $\degree$ C, it takes exactly 7.5 minutes to cook the egg to the same amount. What is the activation energy for the reaction involved when an egg is boiled?

(Multiple Choice)

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Question 63

Which one of the following sets of units is appropriate for a second-order rate constant?

(Multiple Choice)

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Question 64

The gas-phase conversion of 1,3-butadiene to 1,5-cyclooctadiene, 2C₄H₆ $\rightarrow$ C₈H₁₂, was studied, providing data for the plot shown in the graph, of 1/[butadiene] versus time. A) Explain how this plot confirms that the reaction is second order. B) Calculate the second-order rate constant, k. C) Determine the initial concentration of 1,3-butadiene in this experiment. $The gas-phase conversion of 1,3-butadiene to 1,5-cyclooctadiene, 2C4H6 \rightarrow C8H12, was studied, providing data for the plot shown in the graph, of 1/[butadiene] versus time. A) Explain how this plot confirms that the reaction is second order. B) Calculate the second-order rate constant, k. C) Determine the initial concentration of 1,3-butadiene in this experiment.$

(Essay)

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Question 65

The kinetics of the decomposition of dinitrogen pentaoxide is studied at 50 $\degree$ C and at 75 $\degree$ C. Which of the following statements concerning the studies is correct?

(Multiple Choice)

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Question 66

A reaction is second-order with respect to the reactant R. Which of the following plots will produce a straight line?

(Multiple Choice)

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Question 67

In going from room temperature (25.0 $\degree$ C) to 10 $\degree$ C above room temperature, the rate of a reaction doubles. Calculate the activation energy for the reaction.

(Multiple Choice)

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Question 68

Sulfuryl chloride, SO₂Cl₂(g), decomposes at high temperature to form SO₂(g) and Cl₂(g). The rate constant at a certain temperature is 4.68 *10¯⁵s¯¹. What is the order of the reaction?

(Multiple Choice)

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Question 69

A reactant R is being consumed in a first-order reaction. What fraction of the initial R is consumed in 4.0 half-lives?

(Multiple Choice)

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Question 70

For the reaction A(g) + 2B(g) $\rightarrow$ 2C(g) + 2D(g), the following data were collected at constant temperature. Determine the correct rate law for this reaction. $For the reaction A(g) + 2B(g) \rightarrow 2C(g) + 2D(g), the following data were collected at constant temperature. Determine the correct rate law for this reaction.$

(Multiple Choice)

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Question 71

The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and $\Delta$ H $\degree$ _rxn = + 55 kJ/mol. What is the activation energy for the reverse reaction?

(Multiple Choice)

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Question 72

Chlorine atoms act as heterogeneous catalysts in the destruction of ozone in the stratosphere.

(True/False)

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Question 73

Briefly list the features/properties common to all catalysts and how they work. Draw a labeled reaction energy diagram as part of your answer.

(Essay)

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Question 74

The units of the rate of reaction depend on the order of the reaction.

(True/False)

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Question 75

Ammonium cyanate (NH₄CNO) reacts to form urea (NH₂CONH₂). At 65 $\degree$ C, the rate constant, k, is 3.60 L mol¯¹s¯¹. What is the rate law for this reaction?

(Multiple Choice)

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Question 76

The decomposition of SOCl₂ is first-order in SOCl₂. If the half-life for the reaction is 4.1 hr, how long would it take for the concentration of SOCl₂ to drop from 0.36 M to 0.045 M?

(Multiple Choice)

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Question 77

The greater the energy of activation, E_a, the faster will be the reaction.

(True/False)

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Question 78

The rate of a reaction is determined by the rate of the fastest step in the mechanism.

(True/False)

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Question 79

For the reaction 3A(g) + 2B(g) $\rightarrow$ 2C(g) + 2D(g), the following data were collected at constant temperature. Determine the correct rate law for this reaction. $For the reaction 3A(g) + 2B(g) \rightarrow 2C(g) + 2D(g), the following data were collected at constant temperature. Determine the correct rate law for this reaction.$

(Multiple Choice)

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Question 80

Showing 61 - 80 of 89

Exam 16: Kinetics: Rates and Mechanisms of Chemical Reactions

Consider the general reaction: 5Br¯(aq) + BrO3¯(aq) + 6H+(aq) →\rightarrow→ 3Br2(aq) + 3H2O(aq) For this reaction, the rate when expressed as Δ\DeltaΔ [Br2]/ Δ\DeltaΔ t is the same as:

Consider this reaction: 2NH3(g) →\rightarrow→ N2(g) + 3H2(g) If the rate Δ\DeltaΔ [H2]/ Δ\DeltaΔ t is 0.030 mol L¯1 s¯1, then Δ\DeltaΔ [NH3]/ Δ\DeltaΔ t is:

Which one of the following sets of units is appropriate for a second-order rate constant?

The kinetics of the decomposition of dinitrogen pentaoxide is studied at 50 °\degree° C and at 75 °\degree° C. Which of the following statements concerning the studies is correct?

A reaction is second-order with respect to the reactant R. Which of the following plots will produce a straight line?

In going from room temperature (25.0 °\degree° C) to 10 °\degree° C above room temperature, the rate of a reaction doubles. Calculate the activation energy for the reaction.

Sulfuryl chloride, SO2Cl2(g), decomposes at high temperature to form SO2(g) and Cl2(g). The rate constant at a certain temperature is 4.68 *10¯5s¯1. What is the order of the reaction?

A reactant R is being consumed in a first-order reaction. What fraction of the initial R is consumed in 4.0 half-lives?

For the reaction A(g) + 2B(g) →\rightarrow→ 2C(g) + 2D(g), the following data were collected at constant temperature. Determine the correct rate law for this reaction.

The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and Δ\DeltaΔ H °\degree° rxn = + 55 kJ/mol. What is the activation energy for the reverse reaction?

Chlorine atoms act as heterogeneous catalysts in the destruction of ozone in the stratosphere.

Briefly list the features/properties common to all catalysts and how they work. Draw a labeled reaction energy diagram as part of your answer.

The units of the rate of reaction depend on the order of the reaction.

Ammonium cyanate (NH4CNO) reacts to form urea (NH2CONH2). At 65 °\degree° C, the rate constant, k, is 3.60 L mol¯1s¯1. What is the rate law for this reaction?

The decomposition of SOCl2 is first-order in SOCl2. If the half-life for the reaction is 4.1 hr, how long would it take for the concentration of SOCl2 to drop from 0.36 M to 0.045 M?

The greater the energy of activation, Ea, the faster will be the reaction.

The rate of a reaction is determined by the rate of the fastest step in the mechanism.

For the reaction 3A(g) + 2B(g) →\rightarrow→ 2C(g) + 2D(g), the following data were collected at constant temperature. Determine the correct rate law for this reaction.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

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Consider the general reaction: 5Br¯(aq) + BrO₃¯(aq) + 6H⁺(aq) $\rightarrow$ 3Br₂(aq) + 3H₂O(aq) For this reaction, the rate when expressed as $\Delta$ [Br₂]/ $\Delta$ t is the same as:

Consider this reaction: 2NH₃(g) $\rightarrow$ N₂(g) + 3H₂(g) If the rate $\Delta$ [H₂]/ $\Delta$ t is 0.030 mol L¯¹ s¯¹, then $\Delta$ [NH₃]/ $\Delta$ t is:

The kinetics of the decomposition of dinitrogen pentaoxide is studied at 50 $\degree$ C and at 75 $\degree$ C. Which of the following statements concerning the studies is correct?

In going from room temperature (25.0 $\degree$ C) to 10 $\degree$ C above room temperature, the rate of a reaction doubles. Calculate the activation energy for the reaction.

Sulfuryl chloride, SO₂Cl₂(g), decomposes at high temperature to form SO₂(g) and Cl₂(g). The rate constant at a certain temperature is 4.68 *10¯⁵s¯¹. What is the order of the reaction?

The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and $\Delta$ H $\degree$ _rxn = + 55 kJ/mol. What is the activation energy for the reverse reaction?

Ammonium cyanate (NH₄CNO) reacts to form urea (NH₂CONH₂). At 65 $\degree$ C, the rate constant, k, is 3.60 L mol¯¹s¯¹. What is the rate law for this reaction?

The decomposition of SOCl₂ is first-order in SOCl₂. If the half-life for the reaction is 4.1 hr, how long would it take for the concentration of SOCl₂ to drop from 0.36 M to 0.045 M?

The greater the energy of activation, E_a, the faster will be the reaction.