CH-1269
Exothermic and endothermic reactions
Chemistry · Secondary 4 · Hard · Exothermic and endothermic reactions
Hydrogen peroxide, H₂O₂, decomposes according to the equation:
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The reaction is exothermic. Which statement best explains this in terms of bond energies?
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The reaction is exothermic. Which statement best explains this in terms of bond energies?
- More energy is released when new bonds form in the products than is needed to break bonds in the reactants
- More energy is needed to break bonds in the reactants than is released when new bonds form in the products
- The energy needed to break bonds equals the energy released when new bonds form
- No bonds are broken, only new bonds are formed which always release energy
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