Construction of a differential isothermal calorimeter of high sensitivity and low cost

Quimica nova

Trinca, Rafael Bergamo¹  Volpe, Pedro Luiz Onófrio¹  Perles, Carlos Eduardo¹ 

[1] Universidade Estadual de Campinas, Campinas, Brasil

关键词: calorimeter;    excess enthalpy of solution;    binary mixture.;   

DOI  :  10.1590/S0100-40422009000600050

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The high cost ofsensitivity commercial calorimeters may represent an obstacle for many calorimetricresearch groups. This work describes the construction and calibration of a batchdifferential heat conduction calorimeter with sample cells volumes of about400 μL.The calorimeter was built using two small high sensibility square Peltier thermoelectricsensors and the total cost was estimated to be about US$ 500. The calorimeterwas 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.

【 授权许可】

CC BY