Chemistry 5070 · O Level · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

Compound Y undergoes a reaction with oxygen. This reaction shows a positive enthalpy change of reaction, $\Delta H$. What can be inferred about Y and its reaction with oxygen?

  • ACompound Y can be used as a fuel.
  • BCompound Y could be a hydrocarbon.
  • CIn the reaction the energy needed to break bonds is greater than the energy released when bonds are made.
  • DIn the reaction the products are at a lower energy level than the reactants.

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