A self-heating can of coffee contains calcium oxide and water in a separate compartment. When the compartment is broken the coffee becomes hot. Which statement is correct?
The reaction is endothermic and the coffee acts as the surroundings
The reaction is endothermic and the coffee is one of the products
The reaction is exothermic and the coffee acts as the surroundings
The reaction is exothermic and the coffee is one of the products
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.