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The reaction below was monitored as a function of time at 25 °C: AB ----> A...

The reaction below was monitored as a function of time at 25 °C:

AB ----> A + B

A plot of ln[AB] vs. time yields a straight line with slope = -0.0025 sec-1.

  1. What is the value of the rate constant (k) for this reaction at this temperature?
  2. Write the rate law for this reaction.
  3. What is the half-life (t1/2)?
  4. If the initial concentration of AB is 0.500 M, what is the concentration after 300 sec?
  5. If the reaction is run at 217 °C, a plot of ln[AB] vs. time yields a straight line with slope = -0.395 sec-1 . What is the activation energy (Ea) for this reaction?
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