Calorimetry's the science of measuring the heat of chemical reactions or physical changes. Calorimetry involves the use of a calorimeter. The word calorimetry's derived from the Latin word calor, meaning heat. Scottish physician and scientist Joseph Black, who was the first to recognize the distinction between heat and temperature,'s said to be the founder of calorimetry. Indirect calorimetry calculates heat that living organisms produce from their production of carbon dioxide and nitrogen wast… (More on Calorimetry)