Chemical BondingHard

Question

In a multistep reaction such as A + B → Q → C. The potential energy diagram is shown below. What is Ea for the reaction Q → C ?
   

Options

A.3 kcal mol-1
B.5 kcal mol-1
C.8 kcal mol-1
D.11 kcal mol-1

Solution

For Q → C.
Ea = 23 - 20 = 3 kcal mol-1

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