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139 solutions

Arrhenius Equation

Q. The linear form of the Arrhenius equation (ln k vs. 1/T)allows for the calculation of ______ from the slope and the ______ from the intercept. A.frequency factor; activation energy. B.initial concentration; activation energy. C.activation energy; frequency factor. D.activation energy; Boltzmann constant. E.transition state; steric factor

Solved • Feb 19, 2020

Arrhenius Equation

Q. At body temperature (37°C), the rate constant of an enzyme-catalyzed decomposition is 3.0 × 108 times that of the uncatalyzed reaction. If the frequency factor, A, is the same for both processes, by how much does the enzyme lower the Ea?

Solved • Feb 17, 2020

Arrhenius Equation

Q. For a reaction, what generally happens if the temperature is increased?A.A decrease in k occurs, which results in a faster rate. B. A decrease in k occurs, which results in a slower rate. C.An increase in k occurs, which results in a faster rate. D.An increase in k occurs, which results in a slower rate. E.There is no change with k or the rate.

Solved • Feb 16, 2020

Arrhenius Equation

Q. A certain reaction with an activation energy of 115 kJ/mol was run at 485 K and again at 505 K. What is the ratio of f at the higher temperature to f at the lower temperature. Express your answer numerically using one significant figure.

Solved • Feb 11, 2020

Arrhenius Equation

Q. Based on the activation energies and frequency factors, rank the following reactions from fastest to slowest reaction rate, assuming they are all the same temperature and that each starts with the same concentration. Rank from fastest to slowest rate. To rank items as equivalent, overlap them.

Solved • Feb 11, 2020

Arrhenius Equation

Q. The rate constant of a chemical reaction increased from 0.100 s^-1 to 3.10 s^-1 upon raising the temperature from 25.0 °C to 53.0 °C. Part A Calculate the value of ( 1/T2 - 1/T1) where T1 is the initial temperature and T2 is the final temperature. Express your answer numerically. Part B Calculate the value of ln (k1/k2) where k1 and k2 correspond to the rate constants at the initial and the final temperature as defined in Part A. Express your answer numerically. Part C What is the activation energy of the reaction? Express your answer numerically in kilojoules per mole.

Solved • Feb 13, 2020

Arrhenius Equation

Q. For a reaction under study, a graph of In k versus 1/T (K^-1) was prepared. The line of best fit to the data was determined to be: y = -8.09 x 10^3x + 31.5. What is the activation energy, Ea, for this reaction in kJ/mol? a) 5.60 x 10^5 kJ/mol b) 31.5 kJ/mol c) 4.79 x 10^13 kJ/mol d) 67.3 kJ/mol

Solved • Feb 6, 2020