Chemical reactions encompass a variety of processes categorised into subgroups, including endothermic and exothermic reactions, which release energy in forms such as sound, light, cold, or heat.

Endothermic reactions absorb energy from the surroundings. This energy is usually absorbed as heat, so the surroundings get colder. Photosynthesis close photosynthesis A chemical process used by ...

Tell students that when the temperature of a chemical reaction decreases, the reaction is called an endothermic reaction. The first part of the word, endo, means in or into and thermic has to do with ...

An exothermic reaction releases energy in the form of light or heat to its surroundings, contrasting with endothermic reactions which absorb energy. The term "Exo" denotes "release," and "thermic ...

An endothermic reaction absorbs heat and reveals that heat is consumed in the form of a reaction from the surroundings. As q>0, if q is positive, then ΔH is also positive.