What this topic covers
The syllabus points for Topic 5, with every question in the bank filed under exactly one of them. Each opens the bank filtered to that point.
- 5.1Exothermic and endothermic reactions211 questions
- State that an exothermic reaction transfers thermal energy to the surroundings leading to an increase in the temperature of the surroundings
- State that an endothermic reaction takes in thermal energy from the surroundings leading to a decrease in the temperature of the surroundings
- Interpret reaction pathway diagrams showing exothermic and endothermic reactions
- State that the transfer of thermal energy during a reaction is called the enthalpy change, ∆H, of the reaction. ∆H is negative for exothermic reactions and positive for endothermic reactions
- Define activation energy, Ea, as the minimum energy that colliding particles must have to react
- Draw and label reaction pathway diagrams for exothermic and endothermic reactions using information provided, to include: (a) reactants (b) products (c) enthalpy change of the reaction, ∆H (d) activation energy, Ea
- State that bond breaking is an endothermic process and bond making is an exothermic process and explain the enthalpy change of a reaction in terms of bond breaking and bond making
- Calculate the enthalpy change of a reaction using bond energies
Learning objectives from the Cambridge 0620 syllabus 2026–28:CoreSupplement (Extended only)
How to use it
Open the bank and press Solve now to attempt questions one at a time with the answer revealed straight after, or Timed test to work under exam conditions. Written questions give you an answer pad and then the official mark scheme, so you mark yourself against what the examiner actually credits. Every question from 2015 onwards links to the full original paper and its mark scheme.