Exothermic or endothermic?
Exothermic or endothermic?
Chemical reactions rearrange atoms by breaking old bonds and making new ones. In this topic, we focus on thermal energy transferred between the reacting chemicals and the surroundings.
Step-by-step lessons on CIE IGCSE Chemistry Exothermic and endothermic reactions. Each one builds up to exam-style questions. Build a solid grasp of atomic structure, bonding and the mole concept early, since these underpin almost every other topic, then move on to the more calculation-heavy quantitative and organic chemistry content.