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Chemical Kinetics — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryChemical Kinetics2 Marks
Question
Answer the following questions on the basis of the given plot of potential energy vs reaction coordinate:

  1. What is the threshold energy for the reaction?
  2. What is the activation energy for forward reaction?
  3. What is the activation energy for backward reaction?
  4. What is enthalpy change for the forward reaction?

✓

Answer

  1. Threshold energy for the reaction = 300KJ mol-1.
  2. Activation energy for the forward reaction = 300 - 150 = 150KJ mol-1.
  3. Activation energy for the backward reaction = 300 - 100 = 200KJ mol-1.
  4. Enthalpy change for the forward reaction $\Delta_\text{t}\text{H}$ = 100 - 150 = - 50KJ mol-1.

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