The reaction of hydrogen (g) with oxygen (g) to form water(g) proceeds as follows: 2H₂(g) + O₂(9) 2H₂O(g) When 0.651 grams of H₂(g) react with sufficient O₂(g), 78.1 kJ of energy are evolved. What is the value of AH for the chemical equation given? kJ

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