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  • The Ea for an exothermic reaction  is<img alt="\mathrm{ 75 \mat

The Ea for an exothermic reaction \mathrm{A \rightarrow B} is\mathrm{ 75 \mathrm{~kJ} \mathrm{~mol}^{-1}}. Heat of reaction is \mathrm{ 15\, \, \mathrm{kJ\, mol^{-1}}} Chelate the E a for reaction \mathrm{ B \rightarrow A}

Option: 1

90


Option: 2

45


Option: 3

82


Option: 4

67


Answers (1)

best_answer

\mathrm{\begin{gathered} \Delta H=E_{a(f)}-E_{(a b)} \\\\ -15=75-E(a b) \\\\ -15-75=-E(a b) \\\\ E(a b)=90 \end{gathered}}

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vishal kumar

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