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.
Estimate, to two significant figures, the time needed for the concentration of a 0.150 M sucrose solution to decrease to M at .
When the temperature increases from to , the rate of an enzyme-catalyzed reaction increases by a factor of 1.47. Calculate to 3 significant figures the activation energy for this reaction.
A sample of hydrogen peroxide decomposes with a rate constant of s−1 at and s−1 at . Calculate to 3 significant figures the activation energy for this reaction.
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 (pre-exponential) factor for the reaction in terms of the gradient of the plot and the -intercept ?
A sample of dinitrogen pentoxide decomposes with a rate constant of 1.66 L/mol⋅s at 650 K and 7.39 L/mol⋅s at 700 K. Calculate to 3 significant figures the activation energy for this reaction.
Butene can decompose to two molecules of ethene when heated. The rate constant for the decomposition reaction at is s−1 and the activation energy is 261.0 kJ/mol. Estimate the frequency (pre-exponential) factor for the reaction, to 2 significant figures.