Chemistry Practice Problems Reaction Mechanism Practice Problems Solution: Which of the following statements is/are correct?I...

Solution: Which of the following statements is/are correct?I According to the Arrhenius equation, the activation energy of a reaction increases as the temperature of the reaction increases.II In the Arrhenius equation, the frequency factor is a unitless number.III In a multistep mechanism, the overall rate-law expression reflects the rate-law expressions for steps that occur after the rate-determining step.A. All statements are correctB. Only statements I and II are correctC. Only statements I and III are correctD. Only statement II and III is correctE. All statements are incorrect

Problem

Which of the following statements is/are correct?

I According to the Arrhenius equation, the activation energy of a reaction increases as the temperature of the reaction increases.

II In the Arrhenius equation, the frequency factor is a unitless number.

III In a multistep mechanism, the overall rate-law expression reflects the rate-law expressions for steps that occur after the rate-determining step.

A. All statements are correct

B. Only statements I and II are correct

C. Only statements I and III are correct

D. Only statement II and III is correct

E. All statements are incorrect

Solution

For this problem, we are being asked to determine which of the following statements is/are correct

The Arrhenius Equation shows the dependence of the rate constant on the pre-exponential factor, absolute temperature and activation energy of the reaction.


ln k=-EaR 1T + ln A


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