👉 Exothermous is a term in physics that refers to a substance that releases heat when it absorbs energy from another substance. It's used to describe substances like water, which can absorb and release heat depending on its temperature or pressure. In the context of chemistry, an exothermic reaction occurs when a chemical bond breaks down into simpler molecules while absorbing heat. This process is often accompanied by the emission of light as the reactants are broken down into their constituent elements. For example, water (
