High School
SAT
ACT
University
MCAT
LSAT
DAT

A first order gas phase reaction N2O4 → 2 NO2 was carried out isothermally a…

Related Topics

Wize University Chemistry Textbook > Kinetics

Arrhenius Equation

4 Activities

Wize University Chemistry Textbook > Kinetics

Half-lives for Various Orders

3 Activities

checklist
Mark Yourself Question
  1. Grab a piece of paper and try this problem yourself.
  2. When you're done, check the "I have answered this question" box below.
  3. View the solution and report whether you got it right or wrong.
A first order gas phase reaction N2O4 → 2 NO2 was carried out isothermally and the activation barrier was found to be 23.5 kJ/mol. Initially p(N2O4) = 2.6 atm and p(NO2) = 0. After 1 hour p(NO2) = 2.0 atm and p(N2O4) =1.6 atm. Assume that both NO2 and N2O4 are ideal gases.
  1. Determine the first order rate constant k, and the half life t1/2.
  2. The above reaction was performed at 220oC. Calculate the pre-exponential factor.
  3. What does A describe qualitatively?
More Arrhenius Equation Questions:
Kinetics: Arrhenius Equation
What is the activation energy of a reaction if the rate constant at 40oC is double the value of the rate constant at 25oC?
A Schiff base reaction between 3-propanone and aniline proceeds with rate constants of 0.0065 M-1 s -1 and 0.0084 M-1 s -1 at 30oC and 80oC respectively. Determine the activation energy for this reaction.
Report your answer in kJ/mol to two decimal places.
In the gas phase, carbon can react with oxygen as shown below.
C+O2→k1CO2Ea=24.6 kJ/mol\rm C\quad+\quad O_2\quad\overset{k_1}{\overrightarrow{\hspace{1.5cm}}}\quad CO_2\qquad E_a=24.6\ kJ/mol
a) If the reaction is run at room temperature the rate constant is found to be 0.04 atm s−10.04\ atm\ s^{-1}. Determine the pre-exponential factor AA.
In the gas phase, carbon can react with oxygen in two different ways as shown below.
C+O2→k1CO2Ea=24.6kJ/molC+O_2 \xrightarrow{k_1} CO_2 \hspace{20pt} E_a=24.6kJ/mol
C+0.5O2→k2COEa=19.6kJ/molC+0.5O_2 \xrightarrow{k_2} CO \hspace{20pt} E_a=19.6kJ/mol
Kinetics: Arrhenius Equation
What is the activation energy of a reaction if the rate constant at 40oC is double the value of the rate constant at 25oC?
More Half-lives for Various Orders Questions:
The Rate Law: Half Life
What is the half‐life of a reaction that has k = 0.254 M/s and [A]0 of 0.254 M.
The Rate Law: Half life
Given a second order reaction, derive the expression for the half life:
The integrated rate law for the second order reaction is:
1[A]t=kt +1[A]0\frac{1}{\left[A\right]_t}=kt\ +\frac{1}{\left[A\right]_0}
A reaction, A →\rightarrow is performed in a lab and the concentration of the reactant A is plotted as a function of time.
What is the half life?
Practice: Using Integrated Rate Laws
Americium-241 is a synthetic isotope made in nuclear reactors around the world. Chances are you have been in close proximity to this radioactive isotope thousands of times in your life because it is used in household smoke detectors. 241Am is an alpha emitter whose decay obeys a first order rate-law (as do all nuclear decays) with a half-life of 432.6 years.