The intermediate carbocation formed in the reactions of HI,HBr, and HCl with propene is the same and the bond energy of HCl, HBr, and HI is `430.5 KJ mol^(-1), 363.7 KJ mol^(-1)` and `296.8 KJ mol^(-1)` respectively. What will be the order of reactivity of these halogen acids?

Explanation

To determine the order of reactivity of the halogen acids (HI, HBr, and HCl) in their reactions with propene, we can follow these steps:

### Step 1: Understand the Reaction Mechanism
The reaction of halogen acids with propene is an electrophilic addition reaction. In this reaction, the electrophile (H⁺) attacks the double bond of propene, leading to the formation of a carbocation intermediate.

### Step 2: Identify the Intermediate Carbocation
The carbocation formed in the reaction is the same for all three halogen acids. According to Markovnikov's rule, the H⁺ will attach to the carbon atom that has more hydrogen atoms, leading to the formation of a more stable carbocation.

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