A student draws a reaction profile and adds an arrow to show the activation energy.
Where should the activation energy arrow be drawn?
From the reactants up to the top of the peak
From the products up to the top of the peak
From the reactants across to the products
From the bottom of the energy axis up to the peak
51 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.