15. Chemical Kinetics

Which of the following best explains how catalysts increase the rate of chemical reactions?

Which of the following would be a reasonable unit for the rate constant of a second order reaction?

Given the balanced equation 2 NOCl(g) → 2 NO(g) + Cl2(g), if the rate of Cl2 loss is 4.84e-2 M/s, what is the rate of loss of NOCl?

Which of the following graphs best represents the relationship between the concentration of a reactant and the rate of a first-order reaction?

Which term refers to the study of the rates at which chemical reactions occur?

Consider the proposed mechanism for the decomposition reaction 2 H₂O₂(aq) → 2 H₂O(l) + O₂(g) in the presence of I⁻(aq). What is the rate law for this reaction?

Which of the following is NOT an example of a topic studied in chemical kinetics?

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

A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?

In the reaction 3 BrO⁻(aq) → BrO₃⁻(aq) + 2 Br⁻(aq), a plot of 1/[BrO⁻] vs. time is linear. What does this indicate about the order of the reaction with respect to BrO⁻?

Given the concentration of H2O decreases from 0.80 M to 0.60 M between 25 s and 65 s, calculate the average rate of the reaction in M/s.

For the reaction 2AsH3(g) ⟶ As2(g) + 3H2(g), the reaction rate can be expressed in terms of the change in concentration of which of the following species?

For the zeroth-order reaction: A → products, what will happen to the rate of reaction if the concentration of A is doubled?

If an enzyme increases the rate of the hydrolysis reaction by a factor of 1 million, how much lower does the activation energy barrier have to be when sucrose is in the active site of the enzyme? (Assume that the frequency factors for the catalyzed and uncatalyzed reactions are the same.)

Which of the following linear plots do you expect for a reaction A → products if the reaction follows first-order kinetics?