Hydrogen peroxide decomposes in this balanced equation: 2H2O2= H2O +O2. ?H = 200 kj/mol A. Is this reaction endothermic or exothermic? B. If 5.6 g H2O2 is decomposed, how much energy is released or absorbed?
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The reaction is exothermic. We know this because the enthalpy change (?H) is positive, which means energy is being released. B. Show more…
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