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OpenStudy (anonymous):

In the forward direction for the reaction A->B, the activation energy is 105 kJ/mol and the energy (enthalpy) change is +15 kJ/mol. What is the activation energy for the reverse reaction, B->A

OpenStudy (anonymous):

|dw:1361307804443:dw| 105-15=90 so ans is 90kj/mol

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