For a one-step reaction, the activation of the forward reaction is 23.5 kJ/mol, and the activation energy for the reverse reaction is 45.0 kJ/mol. Based on this information, what is the enthalpy of reaction? 68.5 kJ/mol -68.5 kJ/mol O 21.5 kJ/mol O -23.5 kJ/mol O-21.5 kJ/mol

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