Controlling reactions

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Question 28
Medium

To control the rate of a highly exothermic industrial reaction, chemical engineers compare two operating conditions that achieve the same overall rate of reaction, as illustrated by the Maxwell-Boltzmann distributions below:

  • Condition 1: The reaction is run at a lower temperature, T1T_1T1​, using a catalyst.
  • Condition 2: The reaction is run at a higher temperature, T2T_2T2​, without a catalyst.

Maxwell-Boltzmann distributions comparing reaction conditions

Which statement correctly compares the molecular-level properties of the reaction mixture in Condition 1 to Condition 2?

In Condition 1, the activation energy is lower and the average kinetic energy of the molecules is lower.

In Condition 1, the activation energy is lower and the average kinetic energy of the molecules is higher.

In Condition 1, the activation energy is higher and the average kinetic energy of the molecules is lower.

In Condition 1, the activation energy is higher and the average kinetic energy of the molecules is higher.

Controlling reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Controlling reactions