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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

Arrhenius Equation

Q. A student collected time(t) and concentration ([A]) data at 295 K for the reaction 2A →B. These time and concentration data are shown in the table to the right. The student then plotted graphs of {A] versus t (Figure 1), ln [A] versus t (Figure 2), and 1/[A] versus t (Figure 3). Next, the student ran the same reaction at different temperature and measured a different reaction rate, with the following results: What is the activation energy of this reaction? Express your answer to three significant figures and include the appropriate units.

Solved • Feb 13, 2020

Arrhenius Equation

Q. A certain reaction with an activation energy of 125 kJ/mol was run at 555 K and again at 575 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 13, 2020

Arrhenius Equation

Q. The activation energy of a certain reaction is 36.5 kJ/mol/ At 23 °C, the rate constant is 0.0150s^-1. At what temperature in degrees Celsius would this reaction go twice as fast? Express your answer with the appropriate units. Given that the initial rate constant is 0.0150s^-1 at an initial temperature of 23 °C, what would the rate constant be at a temperature of 190. °C for the same reaction described in Part A? Express your answer with the appropriate units.

Solved • Feb 13, 2020

Arrhenius Equation

Q. A certain reaction with an activation energy of 195 kJ/mol was run at 555 K and again at 575 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 6, 2020

Arrhenius Equation

Q. The rate constant of a chemical reaction increased from 0.100 s^-1 to 2.70 s^-1 upon raising the temperature from 25.0 °C to 35..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 6, 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 at the same temperature and that each starts with the same initial concentration. Rank from fastest to slowest reaction rate. to rank items as equivalent, overlap them.

Solved • Feb 6, 2020