Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The energy level diagram for the reaction in which P and Q react to produce R and S is shown. Which row states the energy changes involved and the reaction type?

  • Amore energy is given out when the bonds in the products are formed than is needed to break the bonds in the reactants; endothermic
  • Bmore energy is given out when the bonds in the products are formed than is needed to break the bonds in the reactants; exothermic
  • Cmore energy is needed to break the bonds in the reactants than is given out when the bonds in the products are formed; endothermic
  • Dmore energy is needed to break the bonds in the reactants than is given out when the bonds in the products are formed; exothermic

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