15. Chemical Kinetics

Factors Influencing Rates

Multiple Choice
Which of the following reacting molecules are able to produce products the fastest?
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Multiple Choice
A chemist tries to burn sulfur in air and notices that it burns very slowly. Chemist then burns sulfur in pure oxygen and observes a brilliant blue flame. Which factor is affecting the reaction rate?
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Multiple Choice
The rate law for a particular mechanism is expressed as rate = [A]²[B]. If [A] is halved and [B] is doubled, how would the overall rate be affected?
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Multiple Choice
Identify the intermediate in the mechanism below:

Step 1:NO₂ → NO + O
Step 2:O + NO₂ → O₂ + NO
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Multiple Choice
Calculate the activation energy for the reaction that has a rate constant of 0.124 s^–1 at 125.0 °C and a rate constant of 0.345 at 200.0 °C.
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Multiple Choice
Which of the following statements is false about the effect of temperature on the reaction rate?
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Open Question
How will increasing the surface area of one or more reactants affect the reaction rate of a system?
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Open Question
What two factors speed up rates of chemical reaction and weathering in rocks and soils?
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Open Question
Which of the following could increase the rate of chemical weathering of a rock?
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Open Question
Which of the following factors directly impacts the rate at which a liquid evaporates?
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Open Question
What happens to the reaction rate as the reactants get used up in a reaction?
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