Chemistry 5070 · O Level · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The energy profile diagram for a chemical reaction is shown. Which statement is correct?

  • AThe reaction is exothermic.
  • BX represents the activation energy for the reaction.
  • CY represents $\Delta H$ for the reaction.
  • DZ represents the energy given out as the reaction proceeds.

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