Chemistry · Oct / Nov 2019 · Paper 11 · Question 14
5070Exothermic and endothermic reactions
Which statement about exothermic and endothermic reactions is correct?
- AIn an endothermic reaction, energy is used to break bonds but no energy is released when bonds form.
- BIn an endothermic reaction, energy is released when bonds form but more energy is used to break bonds.
- CIn an exothermic reaction, energy is released both by breaking and by forming bonds.
- DIn an exothermic reaction, energy is released when bonds form but no energy is needed to break bonds.
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Correct answer: B. In an endothermic reaction, energy is released when bonds form but more energy is used to break bonds.
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