CAIE A Level Chemistry 9701 · Chemical energetics
The combustion of ethanol is exothermic.
Describe how the reaction pathway diagram for this reaction shows the enthalpy change and the activation energy of the reaction. Explain the energy change in terms of the breaking and making of bonds.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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