Answer: the measurement of energy that is given off or absorbed in a physical or chemical process
Explanation: Calorimetry is the process of measuring the amount of heat released or absorbed during a chemical reaction.
It can be found whether a reaction is exothermic or endothermic by knowing the change in heat. This is done by the use of device called calorimeter.
Exothermic reactions are accompanied by release of heat whereas endothermic reactions are accompanied by absorption of heat. Thus by knowing the temperature changes, we get to know whether the heat has been released or absorbed.