Zinc powder is added to copper sulfate solution and the temperature of the solution rises. Which statement about the reaction is correct?
It is endothermic, because a displacement reaction always takes in energy
It is exothermic, because energy is transferred from the surroundings to the reaction
It is exothermic, because energy is transferred from the reaction to the surroundings
It is endothermic, because the solution is warmer than it was at the start
39 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.