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|Type:||Artigo de periódico|
|Title:||Construction Of A Differential Isothermal Calorimeter Of High Sensitivity And Low Cost [construção De Um Calorímetro Isotérmico Diferencial De Alta Sensibilidade E Baixo Custo]|
|Abstract:||The high cost of sensitivity commercial calorimeters may represent an obstacle for many calonmetric research groups. This work describes the construction and calibration of a batch differential heat conduction calorimeter with sample cells volumes of about 400 μL. The calorimeter was built using two small high sensibility square Peltier thermoelectric sensors and the total cost was estimated to be about USS 500. The calorimeter was used to study the excess enthalpy of solution of binary mixtures of liquids, as a function of composition, for the following binary systems of solvents: water + 1,4-dioxane or + dimethylsulfoxide at 298,2 ± 0,5 K.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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