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For a reaction $A\rightarrow B$, enthalpy of reaction is $-4.2\ kJ\ mol^{-1}$ and enthalpy of activation is $9.6\ kJ\ mol^{-1}$. The correct potential energy profile for the reaction is shown in option.
A
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B
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C
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D
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Detailed Solution
$\Delta H$ is negative, so the reaction is exothermic: product B lies lower in energy than reactant A, with an activation energy barrier of 9.6 kJ $mol^{-1}$ above A.