metroloogia haru, mis sisaldab keemilistel reaktsioonidel või füüsikalistel muutustel põhinevaid soojuse mõõtemeetodeid, scientific field comprising methods for measurement of heat that be produced or absorbed during chemical reactions or physical changes, science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints