Two solutions are mixed in a polystyrene cup. During the reaction, the temperature of the mixture rises from 20 ∘C20\ ^\circ\text{C}20 ∘C to 28 ∘C28\ ^\circ\text{C}28 ∘C.
How does the energy stored in the products compare with the energy stored in the reactants?
The products store the same energy as the reactants
It depends on the activation energy, which is not given
The products store more energy than the reactants
The products store less energy than the reactants
85 exam-style questions on AQA GCSE Chemistry 5.1 Exothermic and endothermic reactions, covering 5.1.1 Energy transfer during exothermic and endothermic reactions, 5.1.2 Reaction profiles, and 5.1.3 The energy change of reactions. Each one has a worked solution and a mark scheme showing where the marks go.