Cambridge Secondary (7-9). Stage 8. Science. Learner's Book - Unit 8: Chemical reactions - Question 92

Burning is a chemical reaction where thermal energy is given out to the surroundings. Marcus has four fuels to investigate to find out which gives out the most thermal energy to the surroundings. He uses apparatus like this:



Explain what he must do in order to be able to identify which fuel gave out the most thermal energy to the surroundings. [2]