Schematic diagram heat capacity calorimeter

Solution calorimeters are usually adiabatic calorimeters. They are mainly used for the study of rapid reactions, for example, heats of solution, heat capacity of liquids, heat capacity of solids by a method of mixtures, or the enthalpy change of rapid reactions in solution. A schematic diagram is shown as Figure 3. The temperature sensor, plus a means of electrical calibration and a device for mixing reactants are all enclosed within a Dewar flask, or other adiabatic assembly. 

Differential Scanning Calorimetry. Differential scanning calorimetry is in some respects a modification of differential thermal analysis, and the schematic diagram of a differential scanning calorimeter (dsc) is similar to that of the dta device shown in Figure 12. The essential difference, however, is that the measured quantity here is the differential power supplied to the two wells, rather than the temperature difference. In other words, the dsc device maintains the same programmed temperature in each well and records the power required to achieve this. If a transition takes place in the sample, a characteristic excursion in the measured differential power is observed. The nature of these excursions can be related to the transitional properties of the sample. Furthermore, by proper calibration with a reference material of known thermal properties, the specific heat capacity of the sample may be obtained. 

Heat capacity measurements were carried out in a high-precision automated adiabatic calorimeter2 26 which was established by Thermochemistry Laboratory of Dalian Institute of Chemical Physics, Chinese Academy of Sciences in PR China.The schematic diagram of the adiabatic calorimeter is shown in Figure 1. 

---