In this article the construction of a simple calorimeter for the development of a protocol with which it is possible to determine the enthalpy of dissolution of salts is described. Thereunto, salts solutions such as sodium carbonate, sodium bicarbonate, copper sulfate and sodium chloride besides one thermometer and one expanded-polystyrene (Styrofoam) container were used. The experiment allows to assimilate Thermochemistry concepts and can be applied to any high school, since it uses materials easily obtainable at low cost.
calorimetry; enthalpy of dissolution; first law of Thermodynamics
