Multiple Choice
In chapter 19, the catalytic converter on automobiles is not intended to do which one of the following?
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15. Chemical Kinetics
Catalyst
Multiple Choice
Which of the following is true of a catalyst?
A
A catalyst decreases the activation energy and the equilibrium constant of a reaction.
B
A catalyst increases the rate of a chemical reaction without being consumed in the process.
C
A catalyst changes the products formed in a chemical reaction.
D
A catalyst is permanently altered and used up during the reaction.
Verified step by step guidance1
Understand the role of a catalyst in a chemical reaction: A catalyst provides an alternative reaction pathway with a lower activation energy, which increases the reaction rate.
Recall that a catalyst does not affect the equilibrium constant of a reaction because it speeds up both the forward and reverse reactions equally, so the position of equilibrium remains unchanged.
Recognize that a catalyst is not consumed or permanently altered during the reaction; it can be recovered unchanged at the end of the process.
Note that a catalyst does not change the products formed in a chemical reaction; it only affects how quickly equilibrium is reached.
Summarize that the correct statement about a catalyst is that it increases the rate of a chemical reaction without being consumed in the process.
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