If the heat of formation reaction for water as a liquid is 280 kJ mole what is the AHrxn for the electrolysis of H O as seen in

Question

If the heat of formation reaction for water as a liquid is 280 kJ mole what is the AHrxn for the electrolysis of H O as seen in the reaction below 2H O 1 2H2 g O2 g O 560 kJ mole 280 kJ mole O 560 kJ mole Not enough information is given to solve the problem

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