Consider the reaction 2NH3(g) → N2(g) + 3H2(g) If the rate Δ[H2]/Δt is 0.030 mol L−1s−1, then Δ[NH3 ]/Δt 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 are 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 are correct.

Butadiene, C4H6 (used to make synthetic rubber and latex paints) reacts to C8H12 with a rate law of rate = 0.014 L/(mol·s) [C4H6]2. What will be the concentration of C4H6 after 3.0 hours if the initial concentration is 0.025 M?

A) 0.0052 M B) 0.024 M C) 43 M D) 190 M E) 0.0000 M A) 0.0052 M B) 0.024 M C) 43 M D) 190 M E) 0.0000 M

Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide, NO2, in a first-order process. If k = 2.5 × 103 s−1 at −5°C and k = 3.5 × 104 s−1 at 25°C, what is the activation energy for the decomposition?

A) 0.73 kJ/mol B) 58 kJ/mol C) 140 kJ/mol D) 580 kJ/mol E) > 1000 kJ/mol A) 0.73 kJ/mol B) 58 kJ/mol C) 140 kJ/mol D) 580 kJ/mol E) > 1000 kJ/mol

Exam 16: Kinetics: Rates and Mechanisms of Chemical Reactions

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The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and ΔH°_rxn = + 55 kJ/mol. What is the activation energy for the reverse reaction?

(Multiple Choice)

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Question 21

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

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Question 22

Reaction intermediates differ from activated complexes in that

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Question 23

Consider the reaction 2NH₃(g) → N₂(g) + 3H₂(g) If the rate Δ[H₂]/Δt is 0.030 mol L⁻¹s⁻¹, then Δ[NH₃ ]/Δt is

(Multiple Choice)

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Question 24

A reaction intermediate is a species corresponding to a local energy maximum on a reaction energy diagram.

(True/False)

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Question 25

The half-life of a second-order reaction does not depend on the initial concentration of reactant.

(True/False)

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Question 26

Butadiene, C₄H₆ (used to make synthetic rubber and latex paints) reacts to C₈H₁₂ with a rate law of rate = 0.014 L/(mol·s) [C₄H₆]². What will be the concentration of C₄H₆ after 3.0 hours if the initial concentration is 0.025 M?

(Multiple Choice)

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Question 27

In order to obtain the activation energy of a reaction using a graphical method, is plotted against , giving a straight line whose slope is equal to __.

(Multiple Choice)

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Question 28

The reaction X → Y is first-order overall and first-order with respect to the reactant X. The result of doubling the initial concentration of X will be to

(Multiple Choice)

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Question 29

The compound RX₃ decomposes according to the equation 3RX₃ → R + R₂X₃+ 3X₂ In an experiment the following data were collected for the decomposition at 100°C. What is the average rate at which RX₃ is disappearing over the entire experiment?

(Multiple Choice)

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Question 30

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

(Multiple Choice)

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Question 31

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

(True/False)

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Question 32

The half-life of a first-order reaction does not depend on the initial concentration of reactant.

(True/False)

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Question 33

All bimolecular reactions are second-order reactions.

(True/False)

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Question 34

In an exothermic reaction,

(Multiple Choice)

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Question 35

Dinitrogen tetraoxide, N₂O₄, decomposes to nitrogen dioxide, NO₂, in a first-order process. If k = 2.5 × 10³s⁻¹ at −5°C and k = 3.5 × 10⁴s⁻¹ at 25°C, what is the activation energy for the decomposition?

(Multiple Choice)

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Question 36

For the reaction 2A + B + 2C → D + E The following initial rate data were collected at constant temperature. Determine the correct rate law for this reaction. All units are arbitrary.

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Question 37

A boiled egg can be cooked at 100.0°C in exactly 5 minutes. At an altitude of around 2000 m where the boiling point of water is 93.0°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 38

2NOBr(g) → 2NO(g) + Br₂(g) Based on the initial rate data above, what is the value of the rate constant?

(Multiple Choice)

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Question 39

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

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Question 40

Showing 21 - 40 of 78

Exam 16: Kinetics: Rates and Mechanisms of Chemical Reactions

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

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

Reaction intermediates differ from activated complexes in that

Consider the reaction 2NH3(g) → N2(g) + 3H2(g) If the rate Δ[H2]/Δt is 0.030 mol L−1s−1, then Δ[NH3 ]/Δt is

A reaction intermediate is a species corresponding to a local energy maximum on a reaction energy diagram.

The half-life of a second-order reaction does not depend on the initial concentration of reactant.

Butadiene, C4H6 (used to make synthetic rubber and latex paints) reacts to C8H12 with a rate law of rate = 0.014 L/(mol·s) [C4H6]2. What will be the concentration of C4H6 after 3.0 hours if the initial concentration is 0.025 M?

In order to obtain the activation energy of a reaction using a graphical method, __________ is plotted against __________, giving a straight line whose slope is equal to __________.

The reaction X → Y is first-order overall and first-order with respect to the reactant X. The result of doubling the initial concentration of X will be to

The compound RX3 decomposes according to the equation 3RX3 → R + R2X3 + 3X2 In an experiment the following data were collected for the decomposition at 100°C. What is the average rate at which RX3 is disappearing over the entire experiment?

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

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

The half-life of a first-order reaction does not depend on the initial concentration of reactant.

All bimolecular reactions are second-order reactions.

In an exothermic reaction,

Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide, NO2, in a first-order process. If k = 2.5 × 103 s−1 at −5°C and k = 3.5 × 104 s−1 at 25°C, what is the activation energy for the decomposition?

For the reaction 2A + B + 2C → D + E The following initial rate data were collected at constant temperature. Determine the correct rate law for this reaction. All units are arbitrary.

A boiled egg can be cooked at 100.0°C in exactly 5 minutes. At an altitude of around 2000 m where the boiling point of water is 93.0°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?

2NOBr(g) → 2NO(g) + Br2(g) Based on the initial rate data above, what is the value of the rate constant?

For the reaction A(g) + 2B(g) → 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: Definitions, Units, and Problem Solving

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 Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

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The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and ΔH°_rxn = + 55 kJ/mol. What is the activation energy for the reverse reaction?

Consider the reaction 2NH₃(g) → N₂(g) + 3H₂(g) If the rate Δ[H₂]/Δt is 0.030 mol L⁻¹s⁻¹, then Δ[NH₃ ]/Δt is

Butadiene, C₄H₆ (used to make synthetic rubber and latex paints) reacts to C₈H₁₂ with a rate law of rate = 0.014 L/(mol·s) [C₄H₆]². What will be the concentration of C₄H₆ after 3.0 hours if the initial concentration is 0.025 M?

In order to obtain the activation energy of a reaction using a graphical method, is plotted against , giving a straight line whose slope is equal to __.

The compound RX₃ decomposes according to the equation 3RX₃ → R + R₂X₃+ 3X₂ In an experiment the following data were collected for the decomposition at 100°C. What is the average rate at which RX₃ is disappearing over the entire experiment?

Dinitrogen tetraoxide, N₂O₄, decomposes to nitrogen dioxide, NO₂, in a first-order process. If k = 2.5 × 10³s⁻¹ at −5°C and k = 3.5 × 10⁴s⁻¹ at 25°C, what is the activation energy for the decomposition?

2NOBr(g) → 2NO(g) + Br₂(g) Based on the initial rate data above, what is the value of the rate constant?