(HT only) State that energy is released when bonds in products are formed.

In the subtopic The energy change of reactions (HT only), this learning objective focuses on (HT only) State that energy is released when bonds in products are formed. It belongs to Exothermic and endothermic reactions in AQA GCSE Chemistry 8462 Unit 4.5 Energy changes, so the explanation must stay inside energy-transfer, reaction-profile, cell, fuel-cell, exothermic, endothermic, activation-energy or bond-energy context as appropriate. Approved keywords to use include HT only. Exothermic reaction. means a chemical reaction that releases energy to the surroundings, resulting in an increase in temperature Avoid the mistake of students often think that forming bonds always requires energy input, so they write that energy is absorbed when bonds in products are formed; instead, explain that bond formation releases energy; the energy released is the negative of the bond energy and should be subtracted when calculating the overall energy change For exam answers, remember that energy is released when bonds in products are formed; this is key to identifying exothermic reactions