Which of the following statements is correct for the activation energy of a reaction?

  • A
    It always increases with increase in temperature.
  • B
    When activation energy is zero,the rate constant is temperature-dependent.
  • C
    It always decreases with decrease in temperature.
  • D
    It is nearly independent of temperature,over a wide range of temperature.

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The rate of a reaction quadruples when temperature changes from $27^{\circ} C$ to $57^{\circ} C$. Calculate the energy of activation.
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