Citric acid solution reacts with sodium hydrogencarbonate. The reaction is endothermic.
Which statement about the reaction profile for this reaction must be true?
More energy is needed to reach the peak than is taken in overall.
The products are at a lower energy level than the reactants.
The profile has no peak, because energy is taken in throughout.
The activation energy arrow is drawn from the products to the peak.
106 exam-style questions on OCR GCSE Chemistry 3.2 Energetics, covering 3.2.1 Exothermic and endothermic reactions and reaction profiles and 3.2.2 Calculating energy change from bond energies. Each one has a worked solution and a mark scheme showing where the marks go.