Concept explainers
Interpretation:
Using bond energies, the halogen which produces the most exothermic halogenation reaction with ethene is to be identified.
Concept introduction: Bond energy or bond enthalpy is the amount of energy required to break one mole of bonds. Breaking of bonds is an endothermic reaction because energy is always absorbed in the process and its value is always positive. Formation of bonds is an exothermic reaction because energy is always released in the process and its value is always negative.
The enthalpy change is calculated by the formula,
To determine: Using bond energies, the halogen which produces the most exothermic halogenation reaction with ethene.
Correct answer: The correct option is (a).
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