Elaboration of a basic calorimeter applied in the determination of the enthalpy of chemical reactions (Atena Editora)

Abstract

In thermodynamics, calorimetry studies the energies between the energy content between the products and reactant of an enthalpy reaction, which can occur with both compounds in liquid, solid and gaseous states. For the accomplishment of this work, products called acids and bases were used in their liquid form, resulting in a neutralization reaction. In this article, experimental data will be presented in order to demonstrate the enthalpy variations of an acid-base reaction from the construction of a low cost calorimeter, built with easily accessible materials, aiming to concentrate this energy, so that there was the lowest possible dissipation of it, seeking to reach the most plausible possible results compared to the parameters already pre-established for each reaction. We used an expanded polystyrene container (styrofoam), a conventional thermometer, the products and reagent, and at the end thermochemical equations were applied, such as the determination of the heat capacity of the measurement object and finally the appropriate transformations of the neutralization enthalpy calculations. , taking into account the possible interventions of the environment and the parameters not efficiently and accurately of the materials.