SciELO - Scientific Electronic Library Online

 
vol.36 issue2Potencial alelopático e identificação de compostos secundários em extratos de calopogônio (Calopogonium mucunoides) utilizando eletroforese capilarChemical waste management in a teaching and research laboratory: the experience of the Laboratory of Limnology of UFRJ author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Eclética Química

Print version ISSN 0100-4670

Abstract

WOLF, Lúcia Daniela et al. Construction of a simple calorimeter for the enthalpy of dissolution determination. Eclet. Quím. [online]. 2011, vol.36, n.2, pp. 69-83. ISSN 0100-4670.  http://dx.doi.org/10.1590/S0100-46702011000200004.

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.

Keywords : calorimetry; enthalpy of dissolution; first law of Thermodynamics.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese