Exothermic (hyperthermic) reaction: a chemical reaction that releases energy,* Endothermic (hypothermic) reaction: a chemical reaction that absorbs energy.* * Energy = heat, light, etc. The direction of Heat transfer: Exothermic reactions transfer heat energy to the environment. Endothermic reactions transfer heat energy from the environment .
we can answer this question by studying the words themselves. firstly thermic relates to heat. more to the point endo is a prefix for inside while exo is a prefix for outside. therefore an endothermic reaction is one which absorbs heat while an exothermic reaction is one that emits heat. exothermic reaction releases heat from a system to the environment..i.e. explosion of bomb. while endothermic absorbs heat from the environment to the system..i.e. frying fish.
A liquid on its own cannot be described as either endothermic or exothermic. The terms endothermic and exothermic are the names of two opposite process reactions. An endothermic reaction absorbs heat and and exothermic reaction gives off heat. A liquid can be involved in either an endothermic reaction or in an exothermic reaction. If you are evaporating a liquid from its liquid phase to its gas phase, then the reaction is usually endothermic and vice…
It depends on the situation. Suppose the stone is placed in a cup of hot water. It is now endothermic because it absorbs some of the heat. But if it is placed in a cup of frigid water, it is exothermic because it will release some of its heat as it drops in temperature. --------------------------------------------------------------- Endothermic or exothermic are terms used for processes, phenomenons, reactions not for materials.
An endothermic reaction absorbs heat. It cannot proceed without the addition of heat. An exothermic reaction releases heat. Since heat causes chemical reactions to go faster, an exothermic reaction can "feed on itself" and get out of control, releasing damaging amounts of heat and, if proceeding in a closed container, causing an explosion.