In a first-order reaction, if the half-life is 10 minutes, what will be the half

Practice Questions

Q1
In a first-order reaction, if the half-life is 10 minutes, what will be the half-life after doubling the temperature?
  1. 5 minutes
  2. 10 minutes
  3. 20 minutes
  4. It cannot be determined

Questions & Step-by-Step Solutions

In a first-order reaction, if the half-life is 10 minutes, what will be the half-life after doubling the temperature?
  • Step 1: Understand that a first-order reaction has a half-life that is independent of the concentration of reactants.
  • Step 2: Know that the half-life depends on the rate constant (k) of the reaction.
  • Step 3: Recognize that the rate constant (k) increases when the temperature increases.
  • Step 4: Remember that for first-order reactions, as the rate constant increases, the half-life decreases.
  • Step 5: Understand that doubling the temperature will likely increase the rate constant significantly, thus decreasing the half-life.
  • Step 6: To find the exact new half-life, you would need to use the Arrhenius equation, but we know it will be less than 10 minutes.
No concepts available.
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