Classification of calorimeters

The importance of calorimetric data in elaboration of estimation methods of thermodynamic parameters is outlined. Four criteria for calorimeter classification are considered: (i) the parameter controlled by the instrument during the measurement, (ii) the way of taking over the heat accompanying the process, (iii) the method used in order the evaluate the value of the thermal effect and (iv) the procedure by which some reactants get in contact with the measuring part of the instrument. The progresses in the accuracy of the measurements and the extension of the applications of calorimetry during time have been evidenced.