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When hydrogen peroxide (H2O2) is used in rocket fuels, it produces water, oxygen, and heat.

2H2O2(l)⟶2H2O(l)+O2(g)ΔH=−196kJ

How many kilojoules are released when 2.65 moles of H2O2 reacts?

How many kilojoules are released when 234 g of O2 is produced?

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1 answer
  1. a.
    196 kJ x 2.65/2.00 = ? kJ produced.

    b.
    2 mols H2O2 = 2*34 = 68 g.
    196 x (234/68) = ? kJ produced.

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