Worksheet: The Arrhenius Equation
In this worksheet, we will practice using the Arrhenius equation to calculate reaction activation energies and frequency (preexponential) factors.
The rate constant for a reaction, , was measured over a range of reaction temperatures, . The data were plotted on a graph of against . What is the frequency (preexponential) factor for the reaction in terms of the gradient of the plot and the -intercept ?
Hydrolysis of the sugar sucrose () produces glucose and fructose. This first-order reaction has a rate constant of at and at .
Calculate the activation energy for this reaction, to three significant figures.
Calculate the rate constant for this reaction at , to two significant figures.
- A s−1
- B s−1
- C s−1
- D s−1
- E s−1
Estimate, to two significant figures, the time needed for the concentration of a 0.150 M sucrose solution to decrease to M at .
- A days
- B days
- C days
- D days
- E days