Chemistry · Oct / Nov 2017 · Paper 12 · Question 18
5070Exothermic and endothermic reactions
Compound Y reacts with oxygen. This reaction has a positive enthalpy change of reaction, ΔH. What information can be deduced 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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Correct answer: C. In the reaction the energy needed to break bonds is greater than the energy released when bonds are made.
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