ABSTRACT
An evaluation of the heat of adsorption is generally obtained by means of a calorimeter connected to a pressure device, which insures the introduction of small and controlled quantities of gas inside the calorimetric cell, containing the solid sample.[32-34] As in immersion calorimetry, precise data are obtained using differential conduction microcalorimeters. Generally, a device, related to high vacuum manifold, allows the introduction of gas. The dose of gas is placed in a dosing volume before the experiment and then introduced inside the calorimetric cell. Before the experiment, the solid is placed inside the cell, which is maintained under vacuum. The pressure is recorded in the different parts of the total device by pressure gauges.
