Respuesta :

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The forward reaction is:
2H₂(g) + O₂(g) → 2H₂O(g); ΔH = -484 kJ

The forward reaction releases 484 kilojoules of energy to form water. As per the reaction equation, in order to cause two moles of water to decompose and make the reaction proceed backwards, 484 kilojoules of energy must be added to water.
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The reverse reaction will require the addition of 484 kJ of energy.

What is Thermochemistry?

The term thermochemistry has to do with the interplay of energy in chemical reactions. In this case, we have to identify the thermochemical equation for the forward reaction as follows; 2H₂(g) + O₂(g) → 2H₂O(g); ΔH = -484 kJ.

In then follows that the reverse reaction will require the addition of 484 kJ of energy.

Learn more about thermochemistry:https://brainly.com/question/15167411

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