Activation Energy and Arrhenius Equation
Chemistry ⇒ Chemical Kinetics and Equilibrium
Activation Energy and Arrhenius Equation starts at 11 and continues till grade 12.
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Describe how you would determine the activation energy of a reaction experimentally using the Arrhenius equation.
Describe the effect of a catalyst on the activation energy and the rate constant of a reaction.
Describe the physical meaning of the exponential factor in the Arrhenius equation.
Explain how the rate constant changes with temperature according to the Arrhenius equation.
A reaction has a frequency factor of 2.0 × 1012 s-1 and an activation energy of 80 kJ/mol. Calculate the rate constant at 298 K. (R = 8.314 J mol-1 K-1)
A reaction has a rate constant of 1.5 × 10-2 s-1 at 350 K and 3.0 × 10-2 s-1 at 360 K. Calculate the activation energy.
A reaction has a rate constant of 2.0 × 10-3 s-1 at 300 K and 4.0 × 10-3 s-1 at 310 K. Calculate the activation energy.
Calculate the activation energy if the rate constant doubles when the temperature increases from 300 K to 310 K. (R = 8.314 J mol-1 K-1)
The activation energy of a reaction is best described as: (1) The energy released during the reaction (2) The minimum energy required for reactants to form products (3) The energy of the products (4) The energy of the reactants
The Arrhenius equation is an example of which type of relationship? (1) Linear (2) Exponential (3) Logarithmic (4) Quadratic
The slope of a plot of ln k versus 1/T is equal to: (1) -Ea/R (2) Ea/R (3) -R/Ea (4) R/Ea
The unit of the rate constant (k) in the Arrhenius equation depends on: (1) The order of the reaction (2) The activation energy (3) The temperature (4) The gas constant
Fill in the blank: The Arrhenius equation can be written in logarithmic form as ln k = ln A - _________.
Fill in the blank: The Arrhenius equation is used to relate the rate constant to ________ and activation energy.
Fill in the blank: The Arrhenius equation shows that as temperature increases, the rate constant ________.
Fill in the blank: The higher the activation energy, the ________ the reaction rate at a given temperature.
A catalyst lowers the activation energy of a reaction. True or False?
True or False: Increasing the temperature always increases the rate constant of a reaction according to the Arrhenius equation.
True or False: The activation energy can be determined graphically from a plot of ln k versus 1/T.
True or False: The Arrhenius equation can be rearranged to a linear form for graphical analysis.
